Knife - Essential Tool for Camping, Outdoor Adventure and collection

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Collected from a private individual, previously purchased and used.
* Condition: Used, with obvious cosmetic signs of wear and tear, in no way compromising its use
* Commercially available: Discontinued, demilitarized version, without attachments and with top sharpening removed
* Sharpening: Factory (can be improved)
* Marks on blade: Various signs of wear, cosmetic in nature.
* Marks on handle: Various signs of wear, cosmetic in nature.
* Box: Present, original, complete
* Scabbard: Present, original, used, in good condition.
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory

Intended use: tactical/military/multi-role

Blade: full tang in N690Co 58HRC stainless steel with front upper portion of blade NOT sharpened
Handle: detachable in Forprene
Blade length: 180mm.
Blade thickness: 6.3mm.
Total length: 310mm.
Balance: advanced, 1.5cm from the lower guard branch
Weight: 378g.
Sheath: modular tactical with thread cutter, thigh or belt, Nylon - includes diamond sharpener and magnesium fire starter

Sheath: modular tactical with thread cutter, thigh or belt, Nylon - includes a diamond sharpener and magnesium fire starter

This knife is a Collini Cutlery exclusive edition, the one and only Karambit blade ever made by Extrema Ratio and you will not be able to find it in other stores - This is a very small worldwide limited edition of 50 serialized pieces.

Blade: 58HRC N690Co Testudo Stainless Steel
Country of production: Italy
Handles: Black satin anticorodal
Blade Lenght: 90mm.
Blade Thinckness: 4mm.
Total Lenght: 205mm.
Hole Diameter: 22mm
Weight: 152g.
Sheath: Kydex with Tek-Lok
Notes: Worldwide limited edition, only 50pcs each serialized

RAO ACQUIRED FROM VERSION 'AIR FORCE

Intended Use: Military / Tactical

Type of production: industrial
Production Blade: Italy
Blade: Stainless steel N690Co 58/60HRC
Treatment Blade: testudo
Handle: non corroding 4.5mm
Blade length: 118mm.
Blade Thickness: 6.3mm.
Length closed: 142
Total length: 261mm.
Balance: -
Weight: 335g.
Closure: front lock changed - safety pin threaded
Clip: -
Pouch: Comes with a special survival kit that attaches to the knife sheath with MOLLE system
The kit contains whistle, compass, rope, flint, water purification tablets, chain saw, brass wire, torch, diamond sharpener.
One version is produced with black knife sheath and green.

The sheath is used only with the knife open.

Notes: logos departments on the blade

The Extrema Ratio X-ANT represents the pinnacle of the “Every Day Carry” Ant series, designed for those who seek quality and innovation in an exclusive folding knife. Featuring a sintered tungsten carbide blade with 71 HRC hardness, this knife offers exceptional cutting ability, outstanding wear and corrosion resistance, standing out for its high-quality materials and meticulous design. Each X-ANT is an engineering marvel, crafted for daily use (EDC) and collection purposes.

The functional design of the X-ANT is enhanced by a blue anodized titanium handle and a Liner-Lock mechanism, making it secure and easy to open thanks to ball bearings. The limited production of 100 numbered pieces makes this knife a collectible item. The packaging includes a polypropylene case with a pressurization valve, resistant to weather, dust, and impact.

Intended Use: Daily use (EDC), collecting
Production Type: Semi-artisanal, limited series
Country of Manufacture: Italy
Weight: 55 g (1.9 oz)
Blade Length: 50 mm (1.96 in)
Total Length: 127 mm (5 in)
Blade Thickness: 1.6 mm (0.06 in)
Blade Material: Sintered tungsten carbide (71 HRC)
Blade Finish: Sandblast
Blade Grind: Flat edge
Handle Material: Blue anodized titanium
Locking Mechanism: Frame Lock
Clip: yes
Packaging: Polypropylene case with pressurization valve
Notes: Limited edition of 100 numbered pieces

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Provenance: withdrawn from a private collection, previously purchased.
* Condition: Overall in good condition.
* Commercially available: Still in catalog.
* Sharpening: Factory.
* Marks on blade: Marks and abrasions.
* Marks on handle: Small signs of wear and tear.
* Box: Present, not complete (absence of warranties and plastic bags).
* Scabbard: Present, in good condition.
* Manuals, Certificates and Warranties: - -
* Checked and Certified by our in-house laboratory.

Commissioned and officially adopted in 2002 by the renowned 9th Incursor Rgt. “Col Moschin,” this model expresses the quintessence of the pure combat knife. Inspired by the daggers with asymmetric blade and straight but oriented handle of the Arditi, from which the Regiment draws its vestiges, it has been reworked in a modern key. 

The center of gravity is strongly set back, the point particularly piercing. It is light, maneuverable and intuitive. Every new raider receives one, every new raider is trained to use it to the fullest.

Intended use: Collector/Tactical/Military

Blade: N690Co 58HRC stainless steel with Desert Warfare finish
Handle: Forprene
Blade length: 160mm.
Blade thickness: 6.3mm.
Total length: 290mm.
Balance: set back, 1 cm. from the lower guard branch
Weight: 264g.
Sheath: modular tactical, thigh or belt, Nylon
Notes: -

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Provenance: withdrawn from a private collection, previously purchased.
* Condition: Overall in good condition
* Commercially available: Still in catalog.
* Sharpening: Factory.
* Marks on blade: Marks and abrasions.
* Marks on handle: Small signs of wear and tear.
* Box: Present, not complete (absence of warranties and plastic bags).
* Scabbard: Present, in good condition.
* Manuals, Certificates and Warranties: - -
* Checked and Certified by our in-house laboratory

Intended Use: Tactical/Military/Collection

Production type: Industrial
Country of Production: Italy
Blade: stainless steel N690Co 58HRC
Blade Treatment: Burnishing MIL-C-13924
Handle: Polymer
Blade Length: 167mm.
Blade thickness: 6.3mm.
Total length: 270mm.
Weight: 224g.
Sheath: Nylon thigh piece
Packaging: cardboard box with Extrema Ratio logos
Notes: Limited edition in 2018 pieces - Edition to celebrate 100 years of the Italian Ardites

Exclusive product created in collaboration with the PDT YouTube channel - The Cutthroat's Park. This unique knife was actually used in a field test that you can view directly in this product sheet.

To make it even more special, we engraved Floriano's autograph and the PDT logo on the blade. The box of the knife was also autographed by Floriano making it a must-have collector's item.

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Provenance: Floriano of the PDT Parchetto del Tagliagole.
* Condition: Overall in good condition.
* Commercially available: Still in catalog.
* Sharpening: Factory sharpened, stropped by Floriano after use.
* Marks on blade: Signs of concrete use on blade finish.
* Marks on handle: None
* Box: Present
* Scabbard: Present
* Manuals, Certificates and Warranties: /
* Checked and Certified by our in-house laboratory

Intended Use: Sporting

Production Type: Industrial
Country of Production: USA
Blade: full tang in CPM-3V steel
Blade treatment: Microbead blasting and Cerakote
Handle: G10 with stainless steel guard
Blade length: 152mm.
Blade thickness: 4.8mm.
Total length: 272mm.
Handle thickness: 17.8mm.
Weight: 292g.
Sheath: kydex
Packaging: cardboard box with ZT logos.
Notes: knife used in a YouTube video review by Floriano of PDT

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased.
* Condition: Overall in very good condition, minor marks on clip and hardware.
* Commercially available: Discontinued
* Sharpening: Factory sharpened, can be improved.
* Marks on blade: None
* Marks on handle: Small marks on clip and hardware.
* Box: /
* Scabbard: /
* Manuals, Certificates and Warranties: / /
* Checked and Certified by our in-house laboratory

Intended Use: Tactical/Sporting

Production Type: Industrial
Country of Production: USA
Blade: Stainless steel S35VN
Blade finish: Satin finish
Handle: G10 and Titanium stonewashed
Blade length: 91mm.
Blade thickness: 3.6mm.
Length closed: 124mm.
Total length: 216mm.
Thickness when closed: 13mm.
Weight: 178g.
Closure: Frame Lock
Clip: Removable and multi-position, stainless steel
Packaging: not present
Notes: previously purchased knife from a private collection - made in collaboration with Emerson Knives - Patented Wave opening system

KNIFE WITHDRAWN FROM A PRIVATE COLLECTION

* Origin: Withdrawn from a private individual, previously purchased
* Condition: like new
* Commercially available: no longer in production
* Sharpening: original
* Marks on blade: -
* Marks on handle: -
* Box: NO
* Sheath: NO
* Manuals, Certificates and Guarantees: NO
* Checked and Certified by our internal laboratory

Intended use: Tactical/Military

Type of production: Industrial
Blade production: USA
Blade: CTS204P stainless steel
Blade treatment: -
Handle: Carbon Fiber and Titanium stonewashed
Blade length: 91mm.
Blade thickness: 3.6mm.
Length closed: 124mm.
Total length: 216mm.
Thickness when closed: 13mm.
Balance: -
Weight: 178g.
Closure: Frame Lock
Clip: Removable and multi-position, in stainless steel
Sheath: -
Packaging: cardboard box with Zero Tolerance logos
Notes: in collaboration with Emerson Knives - Patented Wave opening system

Versa combines innovative design with unparalleled functionality. The name “Versa” perfectly embodies the characteristics of this knife: its versatility makes it suitable for a variety of situations, showing its adaptability both in urban environments as an EDC (Every Day Carry) knife and in more adventurous settings such as outdoor, survival, bushcraft, hunting and even tactical scenarios. It is also ideal as a backup knife. This knife is ready to meet every need by combining style and practicality in one tool. Versa comes in two distinct models: Versa Satin, perfect for everyday use and Versa Expeditions, more suitable in outdoor, survival and bushcraft settings.

Intended Use: Neck Knife / Hiking / Utility

Type of production: industrial
Country of manufacture: Italy
Blade: full tang, stainless steel N690Co at 58HRC
Blade finish: satin finish
Handle: monolithic, pierced, stainless steel N690Co at 58HRC
Blade length: 80mm.
Blade thickness: 6.3mm.
Total length: 180mm.
Weight: 110g.
Sheath: made of Kydex, for neck
Packaging: cardboard box with Extrema Ratio logos
Notes: /

KNIFE WITHDRAWN FROM A PRIVATE COLLECTION
* Origin: Withdrawn from a private individual, previously purchased
* Condition: USED
* Commercially available: available
* Sharpening: resharpened by our internal laboratory
* Signs on the blade: has superficial scratches on the entire blade on both sides of the blade (visible in the photos) which do not compromise the quality but only the aesthetics
* Signs on the handle: None
* Box: YES
* Sheath: Yes
* Manuals, Certificates and Guarantees: Yes
* Checked and Certified by our internal laboratory

The Giant Mamba has a tanto blade in Böhler N690 steel, 6.3 mm thick with a hardness of 58 HRC, flat edge and full-length lightening fuller.

The Forprene handle with threaded tang lock makes the knife solid and well-balanced. The sheath, M.O.L.L.E. compatible, is made of shock-absorbing nylon with a conical guide for quick insertion and extraction and a system that prevents shaking noises, it is equipped with a two-button safety flap, a thigh with anti-rotation rubber reinforcement and an ambidextrous reversible safety: simply pressing the trigger unlocks the blade.

Intended use: Tactical / Multi-role

Type of production: Industrial
Country of production: Italy
Blade: N690Co 58HRC stainless steel
Blade treatment: Mil-C-13924 burnishing
Handle: Forprene
Blade length: 163mm.
Blade thickness: 6.3mm.
Total length: 293mm.
Weight: 289g.
Sheath: Nylon
Packaging: Cardboard box with Extrema Ratio logos
Notes: -

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased.
* Condition: Like new
* Commercially available: Discontinued, only made in 30 pieces
* Sharpening: Factory sharpened
* Marks on blade: None
* Marks on handle: None
* Box: Present
* Scabbard: Present
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory

Use: tactical, sporting, hiking, collection

Blade: integral, rolled Japanese stainless steel (San Mai) with 61.5HRC cryogenically hardened CoS cutting edge
Handle: forprene
Blade length: 90mm.
Blade thickness: 6.5mm.
Total length: 210mm.
Balance: set back 0.5cm. from the guard branch
Weight: 214g.
Sheath: ABS with multi-position Tek-Lok attachment
Notes:  new knife, withdrawn from private collections

The name "Mato Grosso," comes from Portuguese and means "dense bush," recalling the South American region of the same name. This machete is specially designed to cut through the dense vegetation of tropical forests due to its long, narrow blade. It can be used to cut tall, dense grass, thin vegetation, cut branches and open paths in the most inaccessible forests.

Its forprene handle makes it easy to use. The drop blade, milled from Böhler N690 steel hardened to 58 HRC for the best balance of edge hold and strength, is 309 mm long, 4 mm thick and has a flat edge.

Mato Grosso comes with a black Cordura sheath equipped with an M.O.L.L.E. system that allows it to be carried on tactical vests and belts.

Intended Use: Chopper / Machete

Type of production: Industrial
Country of manufacture: Italy
Blade: stainless steel N690Co hardened to 54HRC
Blade Treatment: Satin finish
Handle: Forprene
Blade Length: 280mm.
Blade thickness: 4mm.
Total length: 450mm.
Weight: 370g.
Sheath: Nylon with belt and M.O.L.L.E. type attachments.
Packaging: cardboard box with Extrema Ratio logos
Notes: Designed and conceived to cut through the dense broadleaf vegetation typical of tropical and rainforests.

A well-motivated classic. The "kukri," the Nepalese multi-purpose tool made famous by Rgt. Gurka, in the service of His Britannic Majesty and derived from ancient Greek falcate swords.

The blade of this machete has differentiated roundings. Near the handle the blade is razor rounded so that a narrow sharpening angle can be achieved without unduly affecting the thickness of the back material, which must remain solid. The rounding at the end of the blade, on the other hand, is flat and well angled so as to effortlessly penetrate wood and vegetation.

Usually these kinds of tools are made of soft steel to be more elastic and more easily resharpened. Extrema Ratio has succeeded in obtaining an elastic tool with a decidedly long-lived and durable sharpening by using instead a hard steel such as BÖHLER N690. This machete comes with a thigh scabbard with black Cordura storage pocket and safety carry strap.

Intended Use: Tactical/Military

Blade: N690Co 58HRC stainless steel
Handle: Kraton
Blade length: 340mm.
Blade thickness: 6.3mm.
Blade finish: satin finish
Total length: 493mm.
Balance: advanced
Weight: 650g.
Sheath: Tactical, Nylon, thigh-high

KNIFE RETIRED FROM PRIVATE COLLECTION
* Type: Previously Purchased
* Condition: In very good condition
* NO longer available on the market
* Sharpening: Factory
* Marks on blade: None
* Marks on handle: Very small marks
* Box: Present
* Sheath: -
* Manuals, Certificates and Guarantees: ER
* Checked and certified by our internal laboratory

Medium folding bag from the BD series. It is produced with an aluminum handle which enhances its characteristics of resistance and lightness, also thanks to the steel frame. The model maintains all the features of the BD2 updated with the new High Speed ​​Razor Opening system.

Intended use: Sports / EDC

Type of production: Industrial
Blade production: Italy
Blade: N690Co 58HRC stainless steel
Blade treatment: Satin
Handle: Anticorodal
Blade length: 95mm.
Blade thickness: 3mm.
Closed length: 128mm.
Total length: 224mm.
Closed thickness: 17mm.
Weight: 105g.
Closure: Liner Lock
Clip: removable in stainless steel
Packaging: cardboard box with Extrema Ratio logos
Note: -

The FULCRUM is a milestone among multi-role knives.

Deployed on a large scale in Afghanistan as standard equipment by components of the Italian "Nibbio" mission, it is part of an experimental individual equipment renewal project undertaken by the Alpine Troops Command. During the preparation for this important mission, Alpine Troops Command coordinated a team of companies in the production of a complete and renewed experimental individual equipment.

The FULCRUM is an extremely robust and versatile knife.
The blade can withstand breaking loads in excess of 150 kilograms, the tip is extremely strong and the tanto profile allows the knife to be worked on for a long time without affecting the sharpness of the last section.
The advanced center of gravity and weight of the blade make it suitable for heavy field work.

Intended use: tactical/military/multipurpose

Type of production: industrial
Country of manufacture: Italy
Blade: stainless steel N690Co
Blade finish: burnishing MIL-C-13924
Handle: forprene, removable
Blade length: 180mm.
Blade thickness: 6.3mm.
Total length: 213mm.
Weight: 325g.
Sheath: modular tactical, thigh or belt, made of Nylon and polymers
Packaging: cardboard box with Extrema Ratio logos
Notes: -

One of our earliest ZTs and still one of our most popular, now offered in a limited run with a CPM-MagnaCut steel blade.

The 0350 is a large and aggressive knife, yet compact and light enough to make it a practical and impressive EDC. The 0350 features ZT's assisted opening system: the blade opens quickly and easily, even with gloves on, thanks to the ambidextrous flipper. The blade is finished with a bold and distinctive tiger stripe pattern made with a tungsten DLC.

Intended Use: Tactical/Military

Type of production: Industrial
Country of manufacture: USA
Blade: CPM-MagnaCut steel
Blade Finish: Tungsten DLC Coating
Handle: G-10
Blade Length: 90mm.
Blade thickness: 3mm.
Length closed: 115mm.
Total length: 195mm.
Thickness when closed: 13mm.
Weight: 162g.
Closure: Liner Lock
Clip: Removable, Multiposition, stainless steel
Packaging: cardboard box with Zero Tolerance logos
Notes: Sprint Run edition with CPM-MagnaCut steel - Design by Mick Strider and Ken Onion - SpeedSafe opening system

ExtremaRatio - Dobermann IV Knife - S600 - Tactical Black represents the evolution of the first and most classic Extrema Ratio model, the K1 DOBERMANN. Since 1997, the DOBERMANN model has undergone significant aesthetic and design changes, adapting to the evolution of tastes and trends while remaining true to the original designs. Versatility of use and structural resistance are the main characteristics of DOBERMANN IV S600, making it ideal for hunting, survival, camping, and military use.

• • Type: Tactical / Collection
  • Blade Production: Italy
  • Blade: Stainless steel S600 64hrc
  • Blade Treatment: EXP DARK
  • Handle: Forprene
  • Blade Length: 185mm
  • Blade Thickness: 6.3mm
  • Total Length: 315mm
  • Weight: 360g
  • Sheath: Cordura with M.O.L.L.E attachments
  • Packaging: Cardboard box with Extrema Ratio logos

The blade of the DOBERMANN IV S600, made from Böhler S600 steel, offers excellent hardness, wear resistance, and toughness, thanks to the high content of molybdenum, tungsten, and vanadium. The addition of cobalt promotes the formation of small carbides, further improving wear resistance. With a hardness of 64 HRC, it ensures long-lasting edge retention. The “EXP DARK” teflon coating protects the steel from oxidation.

DOBERMANN IV S600 features a green forprene handle with a glass-breaking tang. It comes with a green cordura thigh sheath, adaptable for both left and right-handed users and compatible with the M.O.L.L.E system.

The Ant is the most compact among Extrema Ratio's folding knives. Despite its small size, this model features an extremely sturdy, durable, and reliable structure.

The handle is made of two different elements: the cheek piece crafted from anodized anticorodal aluminum and the hardened steel frame which also serves as the blade lock (Frame Lock System). This mechanism involves a part of the frame bending inward to firmly secure the blade in the open position, enhancing the user's safety during the knife's use.

The tang features a hole for the insertion of a lanyard, and on the right side of the handle, there is a steel clip that allows for concealed carry in the pocket.

The Ant Black version utilizes Böhler N690, hardened to 58 HRC for the best balance between edge retention and toughness, a type of steel used by Extrema Ratio for most of its knives.

The blade is sheep foot-shaped and has a small hole on the top part to facilitate opening. Its particular structure, with a straight edge, allows the user to comfortably rest their fingers on the back of the knife and use it with ease.

Type of production: industrial
Blade: in stainless steel N690 58 HRC
Blade production: Italy
Handle: anodized anticorodal aluminum and steel
Blade length: 70mm.
Blade thickness: 2.2mm.
Closed length: 55mm.
Total length: 127mm.
Balancing: -
Weight: 42g.
Closure: Frame Lock
Clip: removable stainless steel
Sheath: -
Notes:

Extrema Ratio Caimano Nero N.A. Ranger XXV Anniversarium Limited Edition is a limited series version of only 250 pieces that preserves intact all the features of the famous Caimano Nero N.A. model, a non-automatic version of the tactical knife that Extrema Ratio delivered to the G.O.I. (Gruppo Operativo Incursori) of the Italian Navy.

The Extrema Ratio Caimano Nero N.A. Ranger XXV Anniversarium Limited Edition comes in an IP67-certified watertight Polypropylene technical case, with pressurization valve, weatherproof, dustproof and shockproof, inside of which is also an Extrema Ratio 25th Anniversary commemorative coin and metal plaque with the progressive number of the limited series.

Intended Use: Tactical/Military

Type of manufacture: industrial
Blade: stainless steel N690Co 58HRC
Country of Production: Italy
Handle: Anticorodal
Blade length: 93mm.
Blade thickness: 4mm.
Length closed: 140mm.
Total length: 231mm.
Weight: 180g.
Closure: Liner Lock with additional safety catch, when knife is open
Clip: deep pocket, reversible and removable, stainless steel
Notes: Limited edition made of only 250 pieces accompanied by polypropylene case and commemorative coin

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously Purchased
* Condition: 2014 knife overall in near new, unused condition, some minor marks on metal parts given by age
* Commercially available Discontinued.
* Sharpening: Factory sharpened, never used for cutting.
* Marks on blade: No
* Marks on handle: Some discoloration of laser engravings given by age.
* Box: Present
* Scabbard: -
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory



Intended Use: Tactical / Multirole

Production type: Industrial
Country of Production: Italy
Blade: stainless steel N690Co hardened to 58HRC
Blade Finish: Desert Warfare
Handle: Anticorodal with stainless steel spacer
Blade length: 115mm.
Blade thickness: 6.3mm.
Total length: 260mm.
Weight: 245g.
Lock system: Back Lock with additional safety pin
Packaging: cardboard box with Extrema Ratio logos
Notes: Previously purchased discontinued specimen from a private collection. Full set, in near-new condition

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously Purchased
* Condition: Overall in good condition.
* Commercially Available Available.
* Sharpening: Factory.
* Marks on blade: A couple of light marks on burnishing.
* Marks on handle: Slight signs of wear on hardware and clip.
* Box: Present, but not in perfect condition
* Scabbard: -
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory


Intended Use: Tactical/Sporting

Production Type: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58HRC
Blade Finish: Burnishing MIL-C-13924
Handle: Anticorodal (aluminum)
Blade length: 68mm.
Blade thickness: 4mm.
Length closed: 110mm.
Total length: 181mm.
Thickness when closed: 15mm.
Weight: 139g.
Closure: Liner Lock, with additional safety catch
Clip: stainless steel removable and reversible
Packaging: cardboard box with Extrema Ratio logos

Thanks to its structure, RAO C is a tool that despite its small size, manages to guarantee the same qualities of robustness and reliability as its big brother while offering better portability and manageability.

The locking mechanism on opening is particularly strong as it is assisted by a safety system that turns it into a true fixed blade. The primary safety on the blade is activated by raising and lowering the locking pin. To provide the user with maximum safety in use, a practical and quick secondary safety has been applied, which can be activated simply by moving the locking pin horizontally.

For the purpose of lightening the steel frames, a template was laser-cut from the profile of the RAO C, which was then used to make a gadget that is delivered with the knife.


Intended use: hiking/tactical

Type of production: industrial
Country of production: Italy
Blade: stainless steel N690Co 58HRC
Blade Finish: Burnishing MIL-C-13924
Handle: anticorodal anodized with hard oxidation
Blade length: 100mm.
Blade thickness: 4mm.
Length closed: 132mm.
Total length: 225mm.
Weight: 239g.
Closure: modified front lock, with push-button aditional safety.
Notes: keychain gadget, with miniature profile of the knife

Extrema Ratio, on the occasion of the 10th anniversary of COM.FO.SE., presents a version in a limited series of only 70 pieces, "A.S.F.K. X BRIGATAE ANNIVERSARIUM LIMITED EDITION". 

A.S.F.K. (Assault Special Forces Knife) is the dagger dedicated to and acquired by the Army Special Forces Command. This model recalls the tradition of arditism and the bloody trench battles punctuated by assaults with a bladed weapon. A.S.F.K. is a trench knife reimagined with a modern twist.

A.S.F.K. X BRIGATAE ANNIVERSARIUM LIMITED EDITION comes in an IP67-certified watertight Polypropylene technical case with pressurization valve that is weatherproof, dustproof and shockproof. Inside is a metal plate with the numbering of the series limited to only 70 pieces.

Intended Use: Tactical/Collection

Type of production: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58HRC
Blade finish: Burnishing Geotech Camo
Handle: Forprene
Blade Length: 162mm.
Blade thickness: 6.3mm.
Overall length: 289mm.
Balance: backward
Weight: 413g.
Sheath: cordura, M.O.L.L.E. compatible.
Packaging: thermoplastic collectible case with logos 
Notes: limited and numbered edition made in only 70 pieces

Ferrum E is a simple, essential and functional EDC (Every Day Carry) folding knife. Equipped with a drop blade, it has a slim and compact shape, the two anodised anticorodal aluminium sheaths make up a light, slender and at the same time very durable handle. It can be housed in a breast pocket, in small torch holsters or inside a single M.O.L.E. loop.

Equipped with a flipper-assisted opening system, the blade rotates on ball bearings that allow for smooth and uncertainty-free blade movement. This mechanism allows the operator to open the blade quickly and easily, even with one hand. The locking system adopted is the tried and tested liner lock.

The reversible clip is positioned at the rear.

Intended use: Tactical / EDC

Production type: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58HRC
Blade finish: Satin
Handle: Rough Anticorodal
Blade length: 75mm.
Blade thickness: 3mm.
Length closed: 90mm.
Total length: 186mm.
Weight: 87g.
Closure: Liner Lock
Clip: Removable and reversible, stainless steel
Packaging: Cardboard box with Extrema Ratio logos
Notes: -

Extrema Ratio S-THIL STONE WASHED is a tactical backup knife with monolithic construction machined from a single piece of 5 mm thick BOHLER N690 steel, developed in collaboration with Thilo designer Arnd Schiller.

The blade, a spear point type, is hardened to 58 HRC in order to achieve the best balance of edge retention and strength, features a false counterbore at the top that enhances penetration and point work characteristics, and has a full-length groove (fuller) that flows elegantly from the blade to the handle. The blade is milled integrally to the knife to enhance its compactness and lightness, maintaining a minimal thickness while still having a profile reminiscent of the classic Extrema Ratio handle.

That profile goes to form two small guards and a comfortable thumb rest to prevent the hand from slipping towards the blade. On the end are a skull crusher with a diamond-shaped tip and a slot that allows a wrist strap to be attached to the knife or the handle to be fitted with paracord coiling.

The molded nylon sheath is designed to be extremely flat with very small side dimensions to make it as compact as possible. The design of the knife makes it ambidextrous, allowing it to be inserted into the sheath with the blade cutting edge to the right or left. The double retention system integral to the sheath consists of four pressure elements that work only two at a time, depending on right/left-handed use, while the nylon textile part has a button that allows the knife to be secured to the sheath.

The end of the sheath has a hole to expel liquids or debris inside. The ability to attach belt clip, ulticlip, malice clip makes it extremely versatile. You can also attach the sheath to the M.O.L.L.E. system by braiding the paracord.


Intended Use: Tactical/Multi-role

Production type: Industrial
Country of manufacture: Italy
Blade: stainless steel N690Co hardened to 58HRC
Blade treatment: Stonewashed
Handle: Steel N690Co 58HRC
Blade length: 119mm.
Blade thickness: 5mm.
Total length: 230mm.
Weight: 123g.
Sheath: Nylon
Packaging: cardboard box with Extrema Ratio logos
Notes: -

Extrema Ratio S-THIL Black Warfare, a special version of the S-THIL model, is a backup knife with a monolithic structure machined from a single piece of 5 mm thick BOHLER N690 steel, developed in collaboration with the designer Thilo Arnd Schiller. The spear point type blade is hardened to 58 HRC in order to obtain the best balance between edge retention and strength, has a false edge in the upper part which enhances the characteristics of penetration and tip work, and is equipped with a Full length furrow flowing elegantly from blade to grip.

The blade is milled integrally with the knife to enhance its compactness and lightness, maintaining a minimum thickness even with a profile that recalls the classic Extrema Ratio handle. This profile forms two small guards and a comfortable thumb rest in order to prevent the hand from slipping towards the blade. On the end there is a skull crusher with a diamond-shaped tip and a slot that allows you to attach a wrist strap to the knife or to equip the handle with paracord winding.

The special Black Warfare version uses the innovative and original Geotech Camo pattern, created by laser engraving. The molded nylon sheath has been designed to be extremely flat and with very small lateral dimensions, in order to make it as compact as possible. The design of the knife makes it ambidextrous, allowing it to be inserted into the sheath with the cutting edge of the blade to the right or left. The double retention system integral with the sheath is made up of four pressure elements that work only two at a time, depending on right/left use, while in the nylon textile part there is a button that allows you to secure the knife to the sheath . The end of the sheath has a hole that allows you to expel liquids or residues inside. The possibility of applying belt clips, ulticlips, malice clips makes it extremely versatile. It is also possible to hook the sheath to the M.O.L.L.E. system. weaving the paracord lanyard.

The S-thil Black Warfare is supplied in an IP67 certified watertight Polypropylene technical case, with pressurization valve, resistant to atmospheric agents, dust and shocks. Inside there are also the Nylon sheath, the double ULTICLIP and the double grain sharpening plate (ceramic abrasive and synthetic diamond).

Intended use: Tactical / Multirole

Type of production: Industrial
Country of production: Italy
Blade: N690Co stainless steel hardened to 58HRC
Blade treatment: BURNISHING MIL-C-13924 GEOTECH CAMO
Handle: N690 steel
Blade length: 119mm.
Blade thickness: 5mm.
Total length: 230mm.
Weight: 123g.
Sheath: in Kydex, with double multiposition ULTICLIP attachment clip
Packaging: Polypropylene case with S-Thil / Extrema Ratio logos
Notes: exclusive briefcase to celebrate the company's 25th anniversary

Intended Use: Sporting/Tactical

Production type: Industrial
Country of Production: USA
Blade: Stainless steel CPM-20CV
Blade treatment: Blackwash
Handle: Carbon fiber and Titanium Blackwash
Blade length: 83mm.
Blade thickness: 3mm.
Length closed: 112mm.
Total length: 191mm.
Weight: 65g.
Closure: Framelock
Clip: Removable, stainless steel
Notes: KVT opening on ball bearings - Carson Flipper opening system - Design by Sinkevich - Limited Edition "Factory Special Series"

Selvans Expeditions, as well as the Selvans model from which it derives, was born from the collaboration between Extrema Ratio and the Master instructor F.I.S.S. (Federazione Italiana Survival Sportivo e Sperimentale) Daniele Dal Canto. This tool is the result of the modification of the ONTOS, military survival knife, realized in order to accentuate and maximize the performance of the knife.

Selvans Expeditions uses Böhler N690 steel heat treated to 58 HRC with MIL-C-13924 burnishing and stone washed surface treatment (Dark Stone finish). The handle has been lengthened and the blade weighted to promote effective cutting strokes. It comes with a desert Cordura sheath with MOLLE system, equipped with a mini pouch containing paracord with flammable filament that can be used in case of emergency and/or critical weather conditions and a Firesteel for lighting fires.

The survival kit (not included and purchasable separately) has been optimized and includes whistle, chainsaw, drinking pads, compass, brass wire, flintlock, flashlight, paracord 2,5 mt. and sharpener.

Intended use: Survival / Heavy Utility

Production type: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58HRC
Blade Finish: Burnishing MIL-C-13924 with Dark Stone finish
Handle: Forprene
Blade length: 160mm.
Blade thickness: 6.3mm.
Total length: 312mm.
Balance: Advanced
Weight: 430g.
Sheath: Cordura, M.O.L.L.E. compatible.
Package: Cardboard box with Extrema Ratio logos
Notes: Designed and developed thanks to the collaboration with the instructor Daniele del Canto of F.I.S.S.S. (Federazione Italiana Survival Spotivo e Sperimentale).

THE BRAND
Exclusive collaboration between Coltelleria Collini and Extrema Ratio marketed under the brand KNIVES.IT. 

TECHNICAL DATA SHEET
Intended Use: Collection / Tactical / Neck knife
Production type: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58/60HRC
Blade finish: Black PVD cat. MIL-C-13924
Handle: Stainless steel N690Co 58/60HRC
Blade length: 40mm.
Blade thickness: 5.5mm.
Total lenght: 166mm.
Weight: 86g.
Sheath: optional (available separately) in Kydex, handcrafted by the Italian Knife Maker Simone Tonolli.
Package: cardboard box with Extrema Ratio logos
Notes: knife created and manufactured by Extrema Ratio - each knife is numbered - Design by LoTactical

HISTORY
The Tengu takes its name from a mythical creature of Japanese folklore that is represented with both human and raven features, they had the reputation of being great warriors and legends say that some founders of martial arts were trained by them.

- It is designed to be used in many different grips, but is especially effective in the reverse grip.
- Designed to be carried in a variety of ways, whether as a neck knife, under shirt, clipped in a pocket or around the waist using optional systems such as Ulti-Clip or Tek-Lok or various M.O.L.L.E. type attachments.
- With its thickness of 5.5 mm. is extremely robust and thanks to the shape of the handle is comfortable even by those with large hands or those who want to use it with tactical gloves.
- The blade is compact, robust and very functional for both precision cutting and hard materials thanks to the serrated part on the back. The tanto-shaped tip is very robust and optimal for engraving work.

DMP is a multi-role knife characterized by a strong versatility of use thanks to the small dimensions. The blade, drop point shape with reinforced tip, is particularly useful for heavy duty use. The full flat rounding gives excellent cutting characteristics.

The sheath is minimalist, stripped of most of the fabric adopting a retention system of 2nd level, going to recall the style of the model to which it is inspired. The main shell is made by injection in shockproof nylon. The secondary retention system is reversible for the ambidextrous portability of the knife.

Intended Use: Tactical / Multi-role

Production type: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58HRC
Blade Treatment: Stone Washed
Handle: Forprene
Blade length: 152mm.
Blade thickness: 6.3mm.
Total length: 282mm.
Weight: 283g.
Scabbard: Nylon
Packaging: Cardboard box with Extrema Ratio logos.
Notes: -

Japanese steel merges with Italian excellence

For this 2021 collaboration, exclusive to Coltelleria Collini, we have decided to propose a series of best sellers produced by Extrema Ratio. Knives made with the famous San Mai steel produced by the Japanese Takefu Steel. Specifically we have used the carbonaceous V-Toku2 at 62/63HRC for the central plate and the stainless SUS410 for the two external plates, in order to guarantee a very high cutting capacity, penetration and edge holding together with an easy resharpening and maintenance but at the same time the blade has a remarkable resistance to corrosion and an important increase of resilience given by the type of extreme steel and the laminated structure.

Intended Use: Neck Knife / Collector's Knife

Type of production: Industrial
Country of Production: Italy
Blade / Handle: Full, laminated Japanese steel (San Mai) with V-Toku2 (carbonaceous) cutting edge at 62/63HRC and SUS410 (stainless steel) outer cheeks
Blade finish: Satin finish
Blade length: 40mm.
Blade thickness: 3mm.
Total length: 129mm.
Weight: 55g.
Sheath: Kydex, for neck.
Packaging: Cardboard box with Extrema Ratio logos.
Notes: Numbered edition - cardboard box with Extremaratio logos and certificate - the central core of the blade and handle is made of carbon steel so it is recommended to wash/dry the knife very well after each use and protect the steel, during storage, with a light surface of lubricant to avoid rust and oxidation.

As in the ancient swords of the Japanese Samurai.

The rolled steel - imported in Italy by Collini Steel directly from the Japanese Takefu Steel - is based on the ancient Japanese tradition in the creation of the famous Samurai swords. As early as 1100, expert Japanese blacksmiths combined different materials to give Katana swords incredible cutting capabilities combined with previously unknown strength and flexibility. It is thanks to this revolutionary construction technique that the Samurai swords have been preserved until our days becoming one of the most fascinating objects made by man. Following this tradition applied to modern metallurgy, we are now able to have technologically advanced steels already tested and used in cutlery also by famous brands such as Fallkniven, Cold Steel, Mcusta, Kai, Sog, Zwilling, Rockstead, etc.

Characteristics of San Mai steel: It is made of different types of metals alloyed together to create a composite that contains and intensifies the strengths of the metals individually taken:

- Longer cutting edge life
thanks to the use of high quality steels with a high carbon content (VG10, CoS, Shiro) or sintered (SPG2), in the core steel, the blade, once hardened, reaches hardness and cutting performance decidedly superior to those achieved with the use of traditional steels.

- Greater resilience
Built on the principle of Japanese swords, the multilayer steel is difficult to break thanks to the toughness of the central steel (Core Steel) and the elasticity of the steel used for the lateral coating (Stainless Steel).

- Improved corrosion resistance
The steel used for the outer layers (Stainless Steel) gives the blade a high resistance to corrosion. The combination of the two or more materials used by Takefu Steel generates, at a galvanic level, a structure that improves corrosion resistance even on the edge.

- Easy machining even after heat treatment
Although steel normally becomes harder after hardening, the lateral steel used in multilayer machining does not lose its softness and allows easy machining, drilling or welding even after heat treatment. For optimum blade performance, cryogenic treatment is recommended.

- Improved aesthetic performance
Knives made of multi-state steel or damask pattern at the end of the processing are aesthetically elegant, refined and highly appreciated by collectors all over the world.

Japanese steel blends with Italian excellence

For this 2020 collaboration, exclusive of Collini Cutlery, we have decided to propose a series of best sellers produced by Extrema Ratio. Knives made with the famous San Mai steel produced by Japanese Takefu Steel. Specifically, we used V-Toku2 carbonaceous at 62 / 63HRC for the central plate and SUS410 stainless steel for the two external plates, in order to guarantee a very high cutting capacity, penetration and sealing of the wire together with an easy regrinding. and maintenance but at the same time the blade has a remarkable resistance to corrosion and an important increase in resilience given by the type of external steel and by the laminated structure.
Selvan model: for this First Production Run a run of 5 pieces numbered from 1 to 5 was created.

The Selvans was born from the collaboration between Extrema Ratio and FISSS (Italian Federation of Sports and Experimental Survival). The project consists of modifying the Ontos, a military survival knife, to accentuate and maximize the performance of the knife as a hiking tool.

The handle has been lengthened and the blade weighted to favor the effectiveness of the cutting strokes and to make more use of the inertia of the stroke.

Intended use: Heavy Utility
Type of production: Industrial
Production Lama: Italy
Blade: integral, laminated Japanese steel (San Mai) with V-Toku2 (carbonaceous) cutting edge at 62 / 63HRC and SUS410 (stainless steel) external scales
Blade treatment: Testudo
Handle: Forprene
Blade length: 15.5mm.
Blade thickness: 6.3mm.
Total length: 310mm.
Thick when closed: -
Balancing: advanced
Weight: 424g.
Sheath: nylon, MOLLE compatible
Packaging: Cardboard box with Extrema Ratio logos
Notes: Numbered edition - cardboard box with Extremaratio logos and certificate - being the cutting edge in carbon steel it is advisable, in order to keep the blade in perfect condition, to protect the edge with a light surface of oil.

As in the ancient Japanese Samurai swords.

The rolled steel - imported into Italy by Collini Steel directly from the Japanese Takefu Steel - is based on the ancient Japanese tradition in the creation of the famous Samurai swords. In fact, as early as 1100 the expert Japanese blacksmiths combined different materials together to give the Katana swords incredible cutting capabilities combined with a resistance and flexibility previously unknown. It is thanks to this revolutionary construction technique that Samurai swords have been preserved to this day, becoming one of the most fascinating objects made by man. Following this tradition applied to modern metallurgy, today we are able to have technologically advanced steels already tested and used in cutlery also by famous brands such as Fallkniven, Cold Steel, Mcusta, Kai, Sog, Zwilling, Rockstead, etc.

Characteristics of San Mai steel: These are different types of metals bonded together to create a composite that encloses and intensifies the strengths of the metals individually taken:
- Longer tool life
thanks to the use of very high quality steels with high carbon content (VG10, CoS, Shiro) or sintered (SPG2), in the heart of the sheet (Core Steel), the blade, once hardened, achieves decidedly hardness and cutting performance higher than those achieved with the use of traditional steels.

- Greater resilience
built on the principle of Japanese swords, multilayer steel is difficult to break thanks to the toughness of the central steel (Core Steel) and the elasticity of the steel used for the side facing (Stainless Steel).

- Better corrosion resistance
the steel used for the external layers (Stainless Steel) guarantees the blade a high resistance to corrosion. The combination of the two or more materials used by Takefu Steel generates, on a galvanic level, a structure that improves corrosion resistance even on the wire.

- Easy processing even after heat treatment
although steel normally becomes harder after quenching, the lateral steel used in multilayer processing does not lose its softness and allows easy processing, drilling or welding even after heat treatment. For an optimal performance of the blade, cryogenic treatment is recommended.

- Improvement of the aesthetic result
The knives made with multi-state steel or with a damask pattern at the end of the processing are aesthetically elegant, refined and highly appreciated by collectors all over the world.

For more information: collinisteel

Project born with the brand of Collini KNIVES.IT cutlery

Custom Kydex sheath, made by Simone Tonolli, designed as an additional replacement for the Tengu knife

Type of production: Custom
Country of production: Italy
Material: thermoformed Kydex
Type of sheath: in "taco" format, with 8 steel rivets, designed for concealed carry or deep carry
Length: 165mm.
Width: 43mm.
Thickness: 8mm.
Weight: 25g.
Packaging: -
Notes: clip or coupling system not present / not supplied, sold separately, compatible with systems such as Ulti-Clip or M.O.L.L.E.
Compatibility: compatible only with the TENGU model by Coltelleria Collini, Knives.it, created in collaboration with Extrema Ratio

The Task series has been designed for all everyday cutting jobs.

The partially symmetrical blade with flat edge on both sides. The hollow part of the blade after the guard, which separates the sharp part from the handle, has been made to house the index finger during use, creating a grip point near the sharp part for better control while using the knife.

This feature, together with the support grip on the back of the knife, allows a better grip while avoiding the slipping of the hand on the blade. This allows you to carry out most cutting jobs with higher pressure.

Intended use: Tactical

Type of production: Industrial
Country of production: Italy
Blade: N690Co stainless steel
Blade finish: Desert Warfare (Burnished with laser engraving)
Handle: Forprene
Blade length: 160mm.
Blade thickness: 6.3mm.
Total length: 290mm.
Weight: 275g.
Sheath: Cordura
Packaging: Cardboard box with Extrema Ratio logos
Note: -