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Extrema Ratio

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27 Items

  1. ExtremaRatio - Lamborghini Reventón Knife - Limited Edition - PRIVATE COLLECTION - 117 - Knife

    Previously owned knife withdrawn from a private collection.

    Type: Previously Purchased
    Condition: Like new
    Availability: Out of production - Limited edition item
    Sharpening: Factory standard
    Blade marks: None
    Handle marks: None
    Box: Included
    Sheath: Not available
    Manuals, Certificates, and Warranties: Included
    Inspected and Certified by our internal laboratory
    Extrema Ratio was chosen by Automobili Lamborghini to produce the Reventón Folder, an emergency knife, seat belt cutter, and glass breaker, designed by the Lamborghini Style Center, and officially included with each of the 20 Reventóns produced, the most exclusive supercar by the House of the Bull.

    The “Reventón Folder” is a high-level functional and aesthetic accessory, clearly in line with the philosophy of the car, created with concepts and technologies directly borrowed from the most advanced aeronautical industry.

    The knife is produced in a limited edition of 2,000 pieces, the first twenty of which equip the Reventóns, and the remaining 1,980 are available for collectors.

    Usage: Collection
    Type of production: Industrial
    Country of production: Italy
    Blade: Stainless steel N690Co 58HRC
    Blade finish: Testudo burnishing
    Handle: Anticorodal
    Blade length: 120mm
    Blade thickness: 6.3mm
    Closed length: 155mm
    Total length: 260mm
    Thickness when closed: 21mm
    Weight: 235g
    Locking mechanism: Back Lock with safety catch
    Clip: Not available
    Sheath: Not available
    Packaging: Plastic box with Lamborghini and Reventon logos
    Note: Item number 117 out of 2000

    AP-REV-ER1
    €483.61
    Only 1 left
    Only 1 left
  2. ExtremaRatio - Caimano Nero N.A. - Ranger XXV Anniversarium Limited Edition - knife

    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

    ER-CAI-RLE
    €342.62
    Only 1 left
    Only 1 left
  3. ExtremaRatio - Misericordia Ranger - XXV Anniversarium Limited Edition - knife

    Extrema Ratio Misericordia Ranger XXV Anniversarium Limited Edition is a limited series version of only 400 pieces that preserves intact all the features of the famous Misericordia model adopted by the 4th Alpine Parachute Regiment.

    Misericordia Ranger XXV Anniversarium Limited Edition comes with 2 sheaths, both in desert color: the first, produced in kydex, offers the possibility of attachment via belt-clip, ulti-clip and malice-clip (optional accessories not included with the product). Attachment to the M.O.L.L.E. system by braiding the paracord is also possible. The second, made of high-strength Nylon, has 2 adjustable loops that allow it to be attached to M.O.L.L.E. systems.


    Intended Use: Tactical/Multi-role

    Production type: Industrial
    Country of Production: Italy
    Blade: stainless steel N690Co hardened to 58HRC
    Blade treatment: Geotech Camo (Black Warfare)
    Handle: FRN (fiberglass reinforced Nylon) with skull crasher / rear glass breaker
    Blade length: 118mm.
    Blade thickness: 4mm.
    Total length: 233mm.
    Weight: 87g.
    Sheath: double sheath: Kydex and ABS.
    Packaging: polypropylene case with Misericordia / Extrema Ratio logos and commemorative Coin
    Notes: Limited edition of only 400 pieces, numbered on box and blade to celebrate the company's 25th anniversary

    ER-MIS-RALE
    €285.25
    Only 1 left
    Only 1 left
  4. ExtremaRatio - K1 Dobermann knife - XXV Anniversary - Limited Edition

    This special edition in 250 pieces, proposed on the occasion of the 25th anniversary of the brand, maintains the shape of the original, but with materials and finishes corresponding to the current production.

    The K1 is equipped with a modified spear point profile blade, characterized by a tip that combines the 40° "tanto" profile with the more traditional European one, creating a sharp but very solid hybrid which, with the false false edge, makes it particularly effective in jab. The bevel is high, allowing for a very effective cutting angle.

    The blade is immediately recognizable by the fenestration at the heel, which allows for considerable lightening without compromising its strength. It is made of Böhler N690 steel, with heat treatments that bring its hardness to 58 HRC for the best combination of edge hold and resistance. The finish is satin with flat grinding.

    The handle, in anodized Anticorodal alloy, compared to the original presents the lightening on the sides that make the Extrema Ratio knives immediately distinguishable, but maintains the arched shape and the lateral "bellies" of the K1, offering an excellent grip both in the "saber" than in the "reverse" grip.

    The terminal part of the handle curves to form a sort of hook which allows particularly easy and rapid extraction from the scabbard, while the tang protrudes from it with a triangular cusp which acts as a glass breaker with a slot which allows the knife to be equipped of lasso.

    The leather scabbard faithfully reproduces the original while maintaining both the qualities of ease and speed of extraction. The carry can take place in an upside-down axillary position, horizontally on the belt or tactically on the thigh.

    The K1 equipment is completed with a polypropylene case ‌, complete leather sheath and underarm shoulder strap.

    WEIGHT g.: 493
    WEIGHT OZ.: 17.39
    BLADE LENGTH (MM): 210
    BLADE LENGTH (IN): 8.26
    TOTAL LENGTH (MM): 351
    TOTAL LENGTH (IN): 13.81
    BLADE THICKNESS (MM): 6.3
    BLADE THICKNESS (IN): 0.25
    BLADE MATERIAL: BÖHLER N690 STEEL (58HRC)
    BLADE FINISH: SATIN
    BLADE GRINDING: FLAT EDGE
    HANDLE MATERIAL: ANODIZED ANTICORODAL ALUMINUM

    ER-K1-D-LE
    €770.49
    Only 1 left
    Only 1 left
    Rating:
    100%
    5
  5. ExtremaRatio - S-Thil Black Warfare knife - XXV Anniversary Special Edition - knife

    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

    ER-STHIL-BWLE
    €265.57
    Only 1 left
    Only 1 left
    Rating:
    100%
    5
  6. ExtremaRatio - Ti-Rock Satin Limited Edition - Laminated CoS & Blue Titanium - PRIVATE COLLECTION - knife

    KNIFE WITHDRAWN FROM PRIVATE COLLECTION
    * Type: Previously purchased
    * Condition: Like new, never taken out of its packaging.
    * Commercially available: Discontinued
    * Sharpening: Factory
    * Marks on blade: None
    * Marks on handle: None
    * Box: Present
    * Scabbard: /
    * Manuals, Certificates and Warranties: Present
    * Checked and Certified by our in-house laboratory


    Coltelleria Collini exclusive - Available in only 33 numbered examples on blade and box


    Intended use: collection / EDC / CQD

    Type of production: industrial, limited
    Blade: Japanese laminated stainless steel (San Mai) with cryogenically hardened 61.5HRC CoS cutting edge; with double concave shank in the strong of the blade
    Blade treatment: satin finish
    Country of manufacture: Italy
    Handle: made of Titanium, machined from solid, with integral Frame Lock system with removable casement and safety made of stainless steel
    Blade length: 75mm.
    Blade thickness: 6.3mm.
    Total length: 180mm.
    Weight: 186g.
    Clip: stainless steel, reversible, deep pocket type and with tip up port
    Notes: tapered Skull Crasher engaged in the tang - Limited and numbered edition of only 33 pieces serialized on the blade and box
    Box: cardboard, numbered, with ExtremaRatio and Coltelleria Collini logos

    TIROCK-C-BL-CP
    €0.00
    Only -20 left
    Only -20 left
    Out of stock
  7. ExtremaRatio - M1A1 Last Call Knife - PRIVATE COLLECTION - Multipurpose Knife

    Previously owned knife withdrawn from a private collection.

    • Type: Previously Purchased
    • Condition: Like new
    • Availability: Limited edition of 130 pieces
    • Sharpening: Factory standard
    • Blade marks: None
    • Handle marks: None
    • Box: Included
    • Sheath: Not available
    • Manuals, Certificates, and Warranties: Included
    • Inspected and Certified by our internal laboratory

    M1A1 is Extrema Ratio's personal interpretation in tribute to the historic folding knife used by the Italian Army. The original knife was part of the British Army's equipment during World War II. After the war, as part of the Marshall Plan for European recovery, the Italian Army received some of the allies' wartime armaments and equipment, including this multifunctional tool. It was later reproduced in Italy in three modified versions.

    Extrema Ratio presents an exclusive, final version limited to only 130 pieces, as a farewell to this historic and renowned knife.

    Like its predecessor, the M1A1 LAST CALL is equipped with a can opener, bottle opener, screwdriver, and knot-untying spike. The reversible clip is designed for maximum concealability.

    The drop blade, like all the other tools listed, features the Geotech Camo personalization, Extrema Ratio's innovative and original camo pattern, created by laser engraving. The locking mechanism is the well-tested LINER LOCK. The handle consists of two scales made of anodized anticorodal aluminum in the new Tactical Mud color.

    • Type of production: Industrial
    • Blade: Stainless steel N690Co 58HRC
    • Blade production: Italy
    • Handle: Anticorodal
    • Blade length: 70mm
    • Blade thickness: 3mm
    • Closed length: 99mm
    • Total length: 168mm
    • Balance: Not specified
    • Weight: 124g
    • Locking mechanism: Liner Lock
    • Clip: Reversible and removable stainless steel
    • Sheath: Not available
    • Notes: Screwdriver, Can Opener, Bottle Opener, Knot-Untying Spike - serial number 81
    ER-BFM1A1LC
    €0.00
    Only -20 left
    Only -20 left
    Out of stock
  8. ExtremaRatio - Waki Satin - XXV Anniversarium - 150pcs. Limited Edition - knife

    WAKI XXV ANNIVERSARIUM LIMITED EDITION is a limited series version of only 150 pieces that keeps all the features of the famous Waki model intact.

    This product is an elaboration of the Japanese Wakizashi sword, a typical blade 30 to 60 centimeters long, which the Samurai always carried in contact with the body, where the Katana was carried exclusively in battle.

    The blade has the classic Japanese Tanto profile and is made of Böhler N690 steel with heat treatments that raise its hardness to 58 HRC for the best combination of edge hold and strength. The blade, with flat rounding, features a precious satin finish.

    The handle, in black coloring, is made of Forprene while The black-colored Cordura sheath is equipped with a MOLLE system that ensures safe carrying of the razor-sharp blade by protecting it from shocks that could reduce its efficiency.

    WAKI XXV ANNIVERSARIUM LIMITED EDITION comes in an IP67-certified watertight Polypropylene technical case with pressurization valve that is weather, dust and shock resistant. Also inside is a metal plaque with the numbering of the limited series of 150 and a commemorative coin of the twenty-fifth Extrema Ratio anniversary.

    Intended Use: Collection / Tactical / Machete

    Production type: Industrial
    Country of manufacture: Italy
    Blade: N690Co stainless steel at 58HRC
    Blade Treatment: Satin finish
    Handle: Forprene
    Blade Length: 297mm.
    Blade thickness: 6.5mm. tapering to 4mm from the handle.
    Total length: 456mm.
    Weight: 384g.
    Sheath: cordura, compatible with M.O.L.L.E. systems.
    Packaging: polypropylene case with numbered metal plaque and commemorative coin with Extrema Ratio logos
    Notes: Limited and numbered edition made in only 150 pieces

    ER-WA-XXV
    €0.00
    Only -20 left
    Only -20 left
    Out of stock
  9. ExtremaRatio - T4000 S Ranger Knife - 100pcs. Limited Edition - knife

    T4000 S Ranger Limited Edition is a limited series version of only 100 pieces based on the T4000 model, a reworking of the Japanese Wakizashi short sword that the Samurai carried at all times in contact with the body.

    It is a timeless tactical tool that follows no fashion but faithfully adheres to the Extrema Ratio philosophy aimed at fulfilling all functional requirements.

    This model continues Extrema Ratio's purest Tanto series designed especially for lovers of the Japanese blade profile, who do not want to give up typical tactical accessories such as textile sheath and special polymer handle.

    The blade, made of Böhler N690 steel hardened to 58 HRC and burnished to MIL - C- 13924, features Geotech Camo customization, Extrema Ratio's innovative and original camouflage pattern made by laser engraving.

    The grip, in HCS coloring, is made of Forprene, an elastomer that is part of the "NATO standard" due to its exceptional resistance to extreme conditions.

    The black-colored Cordura sheath is and equipped with MOLLE system that allows its carrying on tactical vests and general belts and guarantees the safe carrying of the razor-sharp blade by protecting it from shocks that could reduce its efficiency.

    The T4000 S Ranger Limited Edition comes in an IP67-certified watertight Polypropylene technical case with pressurization valve that is weather, dust and shock resistant. Also inside is a double-grit sharpening plate (ceramic abrasive and synthetic diamond) and a metal plaque with the numbering of the limited series of 100.


    Intended Use: Tactical/Collection

    Type of production: Industrial
    Country of Production: Italy
    Blade: Bohler N690Co stainless steel at 58HRC
    Blade Finish: Burnishing MIL-C-13924 with Geotech pattern
    Handle: Forprene
    Blade length: 174mm.
    Blade thickness: 4mm.
    Total length: 304mm.
    Weight: 264g.
    Sheath: Nylon
    Packaging: Polymer case, diamond and ceramic sharpener, Limited run of only 100 pieces

    ER-T4S-RLE
    €0.00
    Only -48 left
    Only -48 left
    Rating:
    100%
    5
    Out of stock
  10. ExtremaRatio - Misericordia Black Warfare - XXV Anniversary Limited Edition - knife

    Special limited edition model created on the occasion of the XXV Anniversary of Extrema Ratio

    Extrema Ratio Misericordia Black Warfare is a version in a limited series of only 500 pieces that preserves intact all the features of the famous Misericordia model adopted by the 4th Alpine Parachute Regiment, which helped develop and test the product and chose it for its unique characteristics that make it particularly suitable for ambush combat.

    The blade is milled from Böhler N690 steel, hardened to 58 HRC for the best balance of edge retention and strength, is 118mm long, 4mm thick, and has a flat edge. The weight of the knife is just 87g. It has a spear-point profile, with a full-length shank that makes it even lighter, features ¾-length false counter-wire, and has a Black Warfare finish, with the innovative and original Extrema Ratio Geotech Camo pattern, made by laser engraving.

    The handle retains the unmistakable Extrema Ratio ergonomic profile, and is made of fiberglass-filled nylon to ensure absolute robustness in all conditions, even in the heaviest of uses. The distinctive ring on the bottom of the grip aids hand grip by allowing the soldier a greater and firmer lunge, exponentially increasing the combat potential of the Misericordia.

    The Kydex scabbard offers belt-clip, ulti-clip and malice-clip attachment options. In addition, it is possible to attach the scabbard to the M.O.L.L.E. system by braiding the paracord lanyard. The Misericordia Black Warfare comes in an IP67-certified watertight Polypropylene technical case, with pressurization valve, weatherproof, dustproof and shockproof, inside of which is also the Kydex sheath, double UTLICLIP, double-grit sharpening plate (ceramic abrasive and synthetic diamond) and metal plaque with the progressive number of the limited series.



    Intended Use: Tactical/Multi-role

    Production Type: Industrial
    Country of manufacture: Italy
    Blade: stainless steel N690Co hardened to 58HRC
    Blade treatment: Geotech Camo (Black Warfare)
    Handle: FRN (fiberglass reinforced Nylon) with rear skull crasher / glass breaker
    Blade length: 118mm.
    Blade thickness: 4mm.
    Total length: 233mm.
    Weight: 87g.
    Sheath: Kydex, with double multi-position ULTICLIP attachment clip
    Packaging: polypropylene case with Extrema Ratio logos
    Notes: Limited edition of only 500 pieces, numbered on box and blade to celebrate the company's XXV anniversary

    ER-MIS-BWLE
    €0.00
    Rating:
    93%
    4.7
    Out of stock
  11. ExtremaRatio - Lamborghini Reventón knife - Limited Edition - PRIVATE COLLECTION - knife

    Reventon knife, no longer in production for years and limited to 2000 pieces, withdrawn from a private collection globally in excellent condition - Complete with everything, plastic box and certificates. Checked and certified by our internal laboratory.

    Extrema Ratio was chosen by Automobili Lamborghini to produce the Reventón Folder, an emergency knife, belt cutter and glass breaker, designed by the Lamborghini Style Center, which becomes the official equipment of each of the 20 Reventón produced, the most exclusive supercar of the House of Bull.

    The "Reventón Folder" is an accessory of the highest functional and aesthetic level, clearly in line with the philosophy of the car built with concepts and technologies directly borrowed from the most advanced aviation industry.

    The knife is produced in a limited edition of 2,000 pieces, the first twenty equip the Reventón, the other 1980 pieces will be available for collectors.

    Intended use: Collection

    Type of production: Industrial
    Production Lama: Italy
    Blade: N690Co 58HRC stainless steel
    Blade treatment: Testudo
    Handle: Anticorodal
    Blade length: 120mm.
    Blade thickness: 6.3mm.
    Closed length: 155mm.
    Total length: 260mm.
    Thick when closed: 21mm.
    Balancing: -
    Weight: 235g.
    Closure: Back Lock with safety catch
    Clip: -
    Sheath: -
    Packaging: plastic box with Lamborghini and Reventon logos
    Notes: Specimen number 297 out of 2000, unique piece at our disposal

    AP-REV-ER
    €0.00
    Only -50 left
    Only -50 left
    Out of stock
  12. ExtremaRatio - N.K.1 Neck Knife - SanMai V-TOKU2 - Limited Edition - NK1 - Knife

    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.

    ER-NK1-CC
    €0.00
    Only -51 left
    Only -51 left
    Rating:
    100%
    5
    Out of stock
  13. Extremaratio - Arditi Deluxe - Single-edged dagger - Limited Collector's Edition - Knife

    The particular situation created in the early years of the 1914/18 war, now mired in increasingly complex and protected trenches and fortifications, favored the formation of men who, little by little, specialized in the coup.

    Our assault units, the Arditi, had their dagger. It was obtained from the pieces cut away by the long blades of the Vetterli 1870 bayonets, which in the narrow trenches, in the corridors, between the reticulars were only an obstacle. It was certainly a rustic weapon, of recovery, not too beautiful but certainly inexpensive, light, not cumbersome and in expert hands also effective.

    Today, on the occasion of the centenary, we recall this important page of Italian military history with a limited celebratory series in only 100 numbered copies. This version has a satin blade and a walnut wood handle and is sold with a wooden box and leather sheath.

     

    Intended use: Tactical / Military / Collection

    Type of production: Industrial
    Country of production: Italy
    Blade: stainless steel N690Co 58HRC
    Blade treatment: Satin
    Handle: Walnut wood
    Blade length: 167mm.
    Blade thickness: 6.3mm.
    Total length: 270mm.
    Weight: 224g.
    Sheath: leather thigh-strap
    Packaging: wooden box
    Notes: Limited edition in 100 numbered copies - Edition to celebrate the hundred years of the Italian Arditi

    ER-AR-D
    €527.87
    Out of stock
  14. Extremaratio - Arditi Black - Single-edged dagger - knife

    The particular situation created in the early years of the 1914/18 war, now mired in increasingly complex and protected trenches and fortifications, favored the formation of men who, little by little, specialized in the coup.

    Our assault units, the Arditi, had their dagger. It was obtained from the pieces cut away by the long blades of the Vetterli 1870 bayonets, which in the narrow trenches, in the corridors, between the reticulars were only an obstacle. It was certainly a rustic weapon, of recovery, not too beautiful but certainly inexpensive, light, not cumbersome and in expert hands also effective.

    Today, on the occasion of the centenary, we remember this important page of Italian military history with a limited series of celebrations of 1918 copies. This version has a burnished blade, a polymer handle and a black cordura sheath.

     

    Intended use: Tactical / Military / Collection

    Type of production: Industrial
    Country of production: Italy
    Blade: stainless steel N690Co 58HRC
    Blade treatment: Burnishing MIL-C-13924
    Handle: Polymers
    Blade length: 167mm.
    Blade thickness: 6.3mm.
    Total length: 270mm.
    Weight: 224g.
    Sheath: Nylon leg strap
    Packaging: cardboard box with Extrema Ratio logos
    Notes: Edition limited edition in 1918 copies - Edition to celebrate the hundred years of the Arditi of Italy

    ER-AR-BK
    €336.89
    Only 0 left
    Only 0 left
    Rating:
    93%
    4.7
  15. ExtremaRatio - BF1CT - Damascus Coreless - Limited Edition - knife

    Purpose of use: Collection / Sportsman

    Type of production: Sprint Run, Industrial, Open Number
    Country of production: Prato - Italy
    Blade: Coreless Steel VG10 / VG2 61HRC made in Japan by Takefu Steel
    Blade treatment: chemical detection
    Handle: Anodized aluminum anticorodal
    Blade Length: 70mm.
    Blade thickness: 2.5mm.
    Closed length: 99mm.
    Total Length: 168mm.
    Closure thickness: 11mm.
    Weight: 84g.
    Opening: ambidextrous opening pin
    Washers: in fiberglass
    Closure: Liner Lock
    Clip: stainless steel, deep pocket, removable and reversible
    Packing: Cardboard box with Extrema Ratio logos - Numbered guarantee certificate
    Notes: Limited edition - Each specimen is numbered on the grip and on the internal warranty certificate - Exclusive Product of Coltelleria Collini

     

    ABOUT THE STEEL

    More than just a damask, Coreless steel made by Japanese Takefu Steel comes with over 70 layers of VG10 and VG2 stainless steel welded, forged and coated between them so that you can form a lightweight, slim and durable blade with a spectacular damask outer pattern.

    The peculiarity of Coreless steel, unlike conventional rolled steel or Japanese San-Mai, is that it does not have a hard core steel that is used for the cutting edge but has both the VG10 and VG2 steels arranged to form the cutting edge so alternating and sequential to each other.

    This particular construction gives the blade - compared to the two steels that make it, individually taken - greater resistance to oxidation, higher surface hardness (up to 61.5HRC), 25% more than cutting capacity, 25% more than the wire hold capacity and 25% more resilience making the blade more robust and less subject to breakage.

    Thanks to this latest steel, Takefu Steel has been rewarded on Japanese territory for research and development and innovation in the cutting-edge landscape. Coreless steel has already been chosen by major brands such as Kai and Mcusta Zanmai who since 2017 proposed it on their top productions of professional kitchen knives.



    Coreless Steel

    ER-BF1CT-C
    €192.62
    Rating:
    100%
    5
    Out of stock
  16. ExtremaRatio - BF1CD - Damascus Coreless - Limited Edition - knife

    Purpose of use: Collection / Sportsman

    Type of production: Sprint Run, Industrial, Open Number
    Country of production: Prato - Italy
    Blade: Coreless Steel VG10 / VG2 61HRC made in Japan by Takefu Steel
    Blade treatment: chemical detection
    Handle: Anodized aluminum anticorodal
    Blade Length: 70mm.
    Blade thickness: 2.5mm.
    Closed length: 99mm.
    Total Length: 168mm.
    Closure thickness: 11mm.
    Weight: 84g.
    Opening: ambidextrous opening pin
    Washers: in fiberglass
    Closure: Liner Lock
    Clip: stainless steel, deep pocket, removable and reversible
    Packing: Cardboard box with Extrema Ratio logos - Numbered guarantee certificate
    Notes: Limited edition - Each specimen is numbered on the grip and on the internal warranty certificate - Exclusive Product of Coltelleria Collini

     

    ABOUT THE STEEL

    More than just a damask, Coreless steel made by Japanese Takefu Steel comes with over 70 layers of VG10 and VG2 stainless steel welded, forged and coated between them so that you can form a lightweight, slim and durable blade with a spectacular damask outer pattern.

    The peculiarity of Coreless steel, unlike conventional rolled steel or Japanese San-Mai, is that it does not have a hard core steel that is used for the cutting edge but has both the VG10 and VG2 steels arranged to form the cutting edge so alternating and sequential to each other.

    This particular construction gives the blade - compared to the two steels that make it, individually taken - greater resistance to oxidation, higher surface hardness (up to 61.5HRC), 25% more than cutting capacity, 25% more than the wire hold capacity and 25% more resilience making the blade more robust and less subject to breakage.

    Thanks to this latest steel, Takefu Steel has been rewarded on Japanese territory for research and development and innovation in the cutting-edge landscape. Coreless steel has already been chosen by major brands such as Kai and Mcusta Zanmai who since 2017 proposed it on their top productions of professional kitchen knives.



    Coreless Steel

    ER-BF1CD-C
    €192.62
    Out of stock
  17. ExtremaRatio - Ti-Rock Satin SanMai CoS - Titanium Black - Limited Edition - folding knife

    A Coltelleria Collini Exclusive - Limited edition, available in only 33 serialized pieces


    Intended Use: collection / EDC / CQD

    Type of production: Industrial, Limited
    Blade: Japanese-rolled stainless steel (San Mai) with sharp CoS to 61,5HRC in cryogenic quenching; with fuller double concave in the strong blade
    Blade treatment: Satin finish
    Production Country: Italy
    Handle: Titanium, Billet, with full Frame Lock locking system with sash and secure removable made of stainless steel
    Blade length: 75mm.
    Blade Thickness: 6.3mm.
    Overall length: 180mm.
    Weight: 186g.
    Clips: stainless steel, reversible type deep pocket and port tip up
    Notes: Skull Crasher tapered shank engaged in - Edition limited and numbered edition in only 33 serialized pieces on the blade and box
    Box: cardboard, numbered, with ExtremaRatio logos and Coltelleria Collini

    TIROCK-C-BK
    €0.00
    Only -99 left
    Only -99 left
    Rating:
    91%
    4.6
    Out of stock
  18. ExtremaRatio - Ti-Rock Satin SanMai CoS - Titanium Blue - Limited Edition - folding knife

    A Coltelleria Collini Exclusive - Limited edition, available in only 33 serialized pieces


    Intended Use: collection / EDC / CQD

    Type of production: Industrial, Limited
    Blade: Japanese-rolled stainless steel (San Mai) with sharp CoS to 61,5HRC in cryogenic quenching; with fuller double concave in the strong blade
    Blade treatment: Satin finish
    Production Country: Italy
    Handle: Titanium, Billet, with full Frame Lock locking system with sash and secure removable made of stainless steel
    Blade length: 75mm.
    Blade Thickness: 6.3mm.
    Overall length: 180mm.
    Weight: 186g.
    Clips: stainless steel, reversible type deep pocket and port tip up
    Notes: Skull Crasher tapered shank engaged in - Edition limited and numbered edition in only 33 serialized pieces on the blade and box
    Box: cardboard, numbered, with ExtremaRatio logos and Coltelleria Collini

    TIROCK-C-BL
    €0.00
    Only -99 left
    Only -99 left
    Rating:
    100%
    5
    Out of stock
  19. ExtremaRatio - Ti-Rock Satin sanmai CoS - Titanium Grey - Limited Edition - folding knife

    A Coltelleria Collini Exclusive - Limited edition, available in only 33 serialized pieces


    Intended Use: collection / EDC / CQD

    Type of production: Industrial, Limited
    Blade: Japanese-rolled stainless steel (San Mai) with sharp CoS to 61,5HRC in cryogenic quenching; with fuller double concave in the strong blade
    Blade treatment: Satin finish
    Production Country: Italy
    Handle: Titanium, Billet, with full Frame Lock locking system with sash and secure removable made of stainless steel
    Blade length: 75mm.
    Blade Thickness: 6.3mm.
    Overall length: 180mm.
    Weight: 186g.
    Clips: stainless steel, reversible type deep pocket and port tip up
    Notes: Skull Crasher tapered shank engaged in - Edition limited and numbered edition in only 33 serialized pieces on the blade and box
    Box: cardboard, numbered, with ExtremaRatio logos and Coltelleria Collini

    TIROCK-C-GR
    €0.00
    Only -99 left
    Only -99 left
    Rating:
    93%
    4.7
    Out of stock
  20. ExtremaRatio - Ti-Rock Tactical Version - Limited Edition - knife

    Collectors Edition with:

    * Box of ABS branded laser
    * Tactical Kydex scabbard and leather, handcrafted
    * Attack Tek-Lok
    * Lanyard black paracord with custom anodized titanium wire stop with slogans and Extrema Ratio Knives Collini

    Only two specimens at our disposal: Number 4 of 100 and number 9 of 100

    This is a Collini Cutlery Exclusive - Only available in 100 serialized pieces

    Intended Use: collection / EDC / CQD
    Type of production: industrial, Limited
    Blade: N690 stainless steel in 58HRC with hollow ground fuller
    Blade Treatment: Black Testudo
    Blade Production: Italy
    Handle: Titanium machined from solid.
    Closing system: Frame Lock with swing and safe removable stainless steel
    Blade length: 75mm.
    Blade Thickness: 6.3mm.
    Overall length: 180mm.
    Weight: 190g.
    Clips: stainless steel, reversible, deep pocket, tip up
    Notes: Conical Skull Crasher engaged in the shank - Limited and serialized edition in only 100 pieces
    Box: Cardboard, serialized, with Extrema Ratio and Coltelleria Collini logos

    Ti-Rock-Collector
    €450.00
    Out of stock
  21. Extrema Ratio - Col Moschin Collector Edition - Black - knife

    Commissioned and officially adopted in 2002 by the famous 9th Regiment. Raiders "Col Moschin", this model expresses the quintessence of pure combat knife.


    Inspired by daggers with asymmetric blade and straight handle but oriented Arditi, from which the Regiment traces its vestiges, it was reworked in a modern way.
    The center of gravity is strong backlog, particularly the tip piercing. And 'light, handy and intuitive. Each new intruder receives one, and each new intruder is trained to use it.


    All knives of this series have straight handles KRATON from ergonomic design whose shape and size favors besides a solid grip the rapid change of straight handle (Sabre Grip) to upside (Reverse Grip). An Allen screw stainless steel allows the campaign from disassembly for maintenance and lubrication of the through shank increasing the operational life of the knife.


    The sheath and 'suitable all'aviolancio and underwater operations and amphibious and is' applicable to the belt or the accoutrements.


    Intended Use: Collection / Tactical / Military

    Production Country: Italy
    Blade: N690Co 58HRC stainless steel
    Surface treatment: Black PVD
    Handle: Removable Kraton
    Blade length: 160mm.
    Blade Thickness: 6.3mm.
    Overall length: 290mm.
    Balancing: backward, 1 cm. the branch of the lower guard
    Weight: 265g.
    Sheath: tactical modular, from thigh or belt, Nylon
    Notes: Limited Edition with exhibitor in Plexyglass

    12507
    €564.75
    Only -99 left
    Only -99 left
    Out of stock
  22. ExtremaRatio - Ti-Rock Tactical Version - Limited Edition - knife

    ** SOLD OUT - OUT OF STOCK AND OUT OF PRODUCTION ** 

     

    This is a Collini Cutlery Exclusive - Only available in 100 serialized pieces

    Intended Use: collection / EDC / CQD
    Type of production: industrial, Limited
    Blade: N690 stainless steel in 58HRC with hollow ground fuller
    Blade Treatment: Black Testudo
    Blade Production: Italy
    Handle: Titanium machined from solid.
    Closing system: Frame Lock with swing and safe removable stainless steel
    Blade length: 75mm.
    Blade Thickness: 6.3mm.
    Overall length: 180mm.
    Weight: 190g.
    Clips: stainless steel, reversible, deep pocket, tip up
    Notes: Conical Skull Crasher engaged in the shank - Limited and serialized edition in only 100 pieces
    Box: Cardboard, serialized, with Extrema Ratio and Coltelleria Collini logos

    Ti-Rock
    €323.77
    Rating:
    98%
    4.9
    Out of stock
  23. ExtremaRatio - SKAR Testudo - Karambit Limited Edition - knife

    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

    SKAR-T-KIT
    €352.46
    Rating:
    93%
    4.7
    Out of stock
  24. ExtremaRatio - SKAR - Karambit Collector's Edition - knife

    ExtremaRatio - SKAR - Karambit Collector's Edition - knife

    SKAR COLLECTOR'S EDITION

    Available in only 10 numbered copies (from 1 to 5 in the version black blade and 1 to 5 in the blade clear version), this edition of the Skar Extremaratio is sold in an elegant box in polymers with the version Skar training aluminum.

    Intended Use: collection / CQB


    Type of production: Industrial, Limited
    Blade: stainless steel N690
    Treatment Blade: Stonewashed
    Production Lama: Italy
    Handle: Anticorodal removable grips
    Blade length: 90mm.
    Blade Thickness: 4mm.
    Overall length: 205mm.
    Hole diameter: 22mm
    Balancing: back, 2 cm from the branch guard
    Weight: 152g.
    Sheath: Kydex, thermoformed, connection type Tek-Lok
    Notes: Limited edition and numbered with certificate, in only 5 pieces
    Housing: plastic, with logos ExtremaRatio

    Faithful implementation of the 1/1 scale SKAR. Entirely anodized aircraft aluminum, this Karambit is made by Extrema Ratio in collaboration with Cutlery Collini Busto Arsizio.

    Free tip and sharp, this knife offers a realistic feeling and maximum safety during training and practice of martial arts that require the use karambit.

    Intended Use: Training
    Production: Italy
    Lama: Aeronautical Aluminum 6061 T6
    Treatment: Anodizing
    Handle: series comes the paracord to assemble; select the drop down menu under the favorite color! E 'can also purchase the handle in aluminum that are mounted on steel version SKAR.
    Blade length: 90mm.
    Blade Thickness: 4mm.
    Overall length: 205mm.
    Hole diameter: 22mm
    Weight: 34g.

    SKAR-KIT
    €270.49
    Out of stock
  25. ExtremaRatio - SKAR Testudo - Karambit Limited Edition - knife

    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

    skar-testudo
    €213.11
    Rating:
    92%
    4.6
    Out of stock
  26. ExtremaRatio - SKAR - Karambit Limited Edition - knife

    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 Stonewashed 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

    skar
    €192.62
    Rating:
    98%
    4.9
    Out of stock
  27. ExtremaRatio - Culter Venatorius - Limited Edition - Hunting Knife

    Extrema Ratio is proud to present the Culter Venatorius that, so as not to contradict the current address is a technical knife, practical, perhaps a bit 'specialized and that gives a nod to tradition and to the tastes of the most traditionalist hunters who like to do everything yourself.

    The Latin motto engraved on the blade reads:

    "I am the hunting knife, I am the claw beak and fang of my master. My job is as old as the flesh and blood.", We find that describes significantly the pure essence of the instrument.

    We feel to say that if a tool could be capable of humor probably would have added: "It 'a dirty job ... but someone has to do it ...".

    The Culter Venatorius, more than a knife, is a complete equipment for slaughtering and skinning of medium and medium-large sized prey, suitable for ungulate hunters.

    The kit includes: a knife to slaughter and general use, one skinner provided with cross handle to skin and clean the internal organs the animal, a carver to skin head and snout and a stone with two grains for regrinding of all instruments.

    These accessories are contained in the sleeve pocket leather fat-crafted.

    The sheath while maintaining the traditional lines, is completely reversible (both the pocket that the passer can be disassembled and applied on the other face of the sheath) and to secure the side which holds the knife has the ambidextrous release. The sheath is handmade by a master saddler leather first-aged choice.

    And 'possible to bring the sheath is vertical to the belt connected to the leg, which in a comfortable horizontal position, the shoulder or stopped at the waist with a long belt kit with buckle and snap hooks.

    The handle in cocobolo oiled is long enough to allow the use of the knife as a little machete or chopper and thin enough to allow precision cuts.

    The blade is in the classic Bohler N690, an excellent steel chrome molybdenum vanadium and cobalt which deserved to become a standard in technical and professional cutlery.

    The finish is satin.

    The Culter Venatorius is dedicated to all those who wish an Extrema Ratio as batting partner.

    - BLADE LENGTH: mm 195
    - LENGTH: 340 mm
    - BLADE THICKNESS: 6.3 mm
    - WEIGHT: 360 g
    - BLADE STEEL: BOHLER N690 (58HRC)
    - HANDLE MATERIAL: Cocobolo oiled
    - GEAR: NO
    - SURFACE FINISH / TREATMENT: Satin
    - LIMITED EDITION: 300 pieces (serial number on the blade in Roman numerals)

    4354
    €0.00
    Only -99 left
    Only -99 left
    Out of stock
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