Year 2021
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ExtremaRatio - BF2CD Knife Stone Washed - Classic Drop - knife
The BF2 is a "full size" lockable particularly suitable for professional use by military and police operators in the field. The handle is firm and comfortable; the clip, reversible and enveloping, becomes a useful and comfortable support for the thumb in "reverse grip". The grip is full with the characteristic lowered surfaces to engage the opening "pins" without protruding from the profile of the closed knife. The blade, available in a drop or a lot version, has a flat edge and, as in the BF1, a particularly thick and resistant tip. The blade locking mechanism is the tested LINER-LOCK, assisted by a safety mechanism to be operated manually protected by a casing.
Intended use: Tactical / Military
Type of production: industrial
Blade: N690Co 58HRC stainless steel
Country of production: Italy
Handle: Anticorodal
Blade length: 90mm.
Blade thickness: 3mm.
Closed length: 124mm.
Total length: 210mm.
Balancing: -
Weight: 142g.
Closure: Liner Lock
Clip: reversible and removable in stainless steel
Sheath: -
Notes: Safety stop with open knifeER-BF2CD-SW -
ExtremaRatio - BF2CT Knife Stone Washed - Classic Tanto - knife
Il BF2 è un chiudibile “full size” particolarmente indicato per l’impiego professionale da parte di operatori militari e di polizia sul campo. L’impugnatura è salda e confortevole; la clip, reversibile ed avvolgente, diventa un utile e comodo appoggio per il pollice in “reverse grip”. La guancetta è piena con i caratteristici piani ribassati per impegnare i “pin” d’apertura senza che sporgano dal profilo del coltello chiuso. La lama, disponibile in versione drop o tanto, ha l’arrotatura piatta e, come nel BF1, la punta particolarmente spessa e resistente. Il meccanismo di blocco della lama è il collaudato LINER-LOCK, coadiuvato da un meccanismo di sicura da azionare manualmente protetto da un carter.
Destinazione d'uso: Tattico/Militare
Tipo di produzione: industriale
Lama: in acciaio inox N690Co 58HRC
Paese di produzione: Italia
Impugnatura: Anticorodal
Lunghezza lama: 90mm.
Spessore lama: 3mm.
Lunghezza chiuso: 124mm.
Lunghezza totale: 210mm.
Bilanciatura: -
Peso: 142g.
Chiusura: Liner Lock
Clip: reversibile ed amovibile in acciaio inox
Fodero: -
Note: Fermo di sicurezza a coltello apertoER-BF2CT-SW -
ExtremaRatio - DMP - Black - tactical knife
DMP is a multi-role knife characterized by a strong versatility of use thanks to the small dimensions. The drop point blade 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: Burnishing MIL-C-13924
Handle: Forprene
Blade length: 152mm.
Blade thickness: 6.3mm.
Total length: 282mm.
Weight: 283g.
Sheath: Nylon
Packaging: Cardboard box with Extrema Ratio logos.
Notes: -ER-DMP-BK -
ExtremaRatio - DMP - HCS StoneWashed - Knife
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: -ER-DMP-HC -
ExtremaRatio - DMP - Wolf Gray StoneWashed - Knife
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: -ER-DMP-WG -
ExtremaRatio - DMP - Ranger Green StoneWashed - knife
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: -ER-DMP-RG -
ExtremaRatio - T4000 C Satin - knife
Intended Use: Sporting / Backup
Production type: Industrial
Country of Production: Italy
Blade: Bohler N690Co stainless steel at 58HRC
Blade Finish: Satin finish
Handle: Forprene
Blade length: 104mm.
Blade thickness: 4mm.
Total length: 208mm.
Weight: 196g.
Sheath: Nylon
Packaging: Cardboard box with Extrema Ratio logos.ER-T4C-SA -
ExtremaRatio - Bayonet O.D. Green Civile NFG Fulcrum knife - Testudo - knife
After the success of the FULCRUM multirole knife, the civil bayonet version NFG (No Fixing Gears, without rifle attachment) was born. Like the FULCRUM, the bayonet is an extremely robust and versatile knife, the blade withstands breaking loads exceeding 150 kg, the tip is very robust and the profile allows you to work for a long time with the knife without affecting the sharpness of the last section . The advanced center of gravity and the weight of the blade make it suitable for heavy field work.
Intended use: tactical / military / multirole
Blade: N690Co 58HRC stainless steel
Handle: removable, in Forprene
Blade length: 180mm.
Blade thickness: 6.3mm.
Closed Length: -
Total length: 310mm.
Balance: advanced, 1.5 cm from the lower guard branch
Weight: 330g.
Closing: -
Clip: -
Sheath: modular tactical, from thigh or belt, in Nylon and Kydex, with blade attachment system for cutting with wire cutters
Notes: diamond sharpener integrated in the sheath - civil version, without rifle couplingsER-FBN-GR -
ExtremaRatio - Herring NE - Fairbairn Sykes Dagger - tactical knife
The Herring dagger is one of the most loved military knives by enthusiasts.
Its original name is Fairbairn Sykes or Commando Dagger and it was present in the endowment of the British Commandos.
A dagger that entered Italian history in World War II, thanks to the exploits of young soldiers of the 1st "Folgore" Reconnaissance Squadron, who were equipped with this weapon during Operation Herring. He has behind him a heroic piece of history that is rarely talked about, despite the fact that these young boys, thanks to their devotion to the cause and their courage, have written an important page in Italian history.
Extrema Ratio wanted to pay homage to this dagger trying to remain faithful to the original forms, while using the most modern production techniques.
The very special hand-made finish of the handle simulates the aging of brass and gives the dagger a dated look, similar to the original.
The dagger was developed in collaboration with the 185th RAO and adopted as a ceremonial commemorative dagger for the 20th anniversary of the regiment's establishment and the 75th anniversary of the Herring mission.
The knife is equipped with a polymer case with historical frieze of the F Squadron, leather / kydex sheath with brass tip and two commemorative scrolls.
PLEASE NOTE:
NE version, simulacrum replica with rounded tip and blunt blade, to allow free sale and possession according to the current regulations in force on the Italian territory.We warn that any subsequent modifications and sharpening made to the blade modify the status of simulacrum of the Herring NE. In this case it will be subject to the regulations in force in the respective countries. Furthermore, these changes will void the Extrema Ratio warranty.
Intended use: Collection / Tactical
Type of production: Industrial
Country of production: Italy
Blade: not sharp, in stainless steel N690Co 58HRC
Blade treatment: Burnishing MIL-C-13924
Handle: Aged brass
Blade length: 167mm.
Blade thickness: 6.3mm.
Total length: 289mm.
Weight: 276g.
Sheath: leather, ABS and brass sheath
Packaging: Polymer case with historical frieze of Squadron F and 2 commemorative scrolls
Note: -ER-HER-NE -
Olivia Garden - Silkcut XL hair cutting scissors - 6 "- 32458 - professional scissors
OLIVIA GARDEN was created in 1967 by Jean & Micheline Rennette in Liège, Belgium with the aim of providing hairdressers with high-quality, innovative, design and above all cutting-edge tools.
Thanks also to the 55 patents acquired, Olivia Garden's tools are used in the backstage of New York Fashion Week, in television shows, on film sets and used by famous designers all over the world.
6 pl. Hair cutting scissors
Made of very high quality steel to ensure greater hardness and longevity of the cut.
The ergonomic handles allow for comfortable handling thanks to the offset handle with a special curve of the thumb, which keeps the hand relaxed. Complete with two rubber finger rings.
Adjustable tension fulcrum with dial with hands for better control and cutting precision.
OG-32458 -
Olivia Garden - Silkcut Pro thinning scissors - 6,5 "- 32464 - professional scissors
OLIVIA GARDEN was created in 1967 by Jean & Micheline Rennette in Liege, Belgium with the aim of providing hairdressers with high-quality, innovative, design and above all cutting-edge tools.
Thanks also to the 55 patents acquired, Olivia Garden's tools are used in the backstage of New York Fashion Week, in television shows, on film sets and used by famous designers all over the world.
EUR Thinner thinner scissors .6.35 pl - with 35 teeth with micro-serrations
Made of very high quality steel to ensure greater hardness and longevity of the cut.
The ergonomic handles allow for comfortable handling thanks to the offset handle with a special curve of the thumb, which keeps the hand relaxed. Complete with two “finger rings” rubber rings.
OG-32452 -
Olivia Garden - Silkcut Pro thinning scissors - 6,5 "- 32464 - professional scissors
OLIVIA GARDEN was created in 1967 by Jean & Micheline Rennette in Liege, Belgium with the aim of providing hairdressers with high-quality, innovative, design and above all cutting-edge tools.
Thanks also to the 55 patents acquired, Olivia Garden's tools are used in the backstage of New York Fashion Week, in television shows, on film sets and used by famous designers all over the world.
EUR Thinner thinner scissors .6.35 pl - with 35 teeth with micro-serrations
Made of very high quality steel to ensure greater hardness and longevity of the cut.
The ergonomic handles allow for comfortable handling thanks to the offset handle with a special curve of the thumb, which keeps the hand relaxed. Complete with two “finger rings” rubber rings.
OG-32464 -
ExtremaRatio & Knives.it - Tengu Tactical - Icepick Karambit - knife
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 LoTacticalHISTORY
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.ER-TENGU -
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 -
ExtremaRatio - Ermes - Satin Ordinanza - Collectors Edition - knife
ERMES is the commemorative knife developed in collaboration with the Special Operations Helicopter Regiment (R.E.O.S.) which is part of the Army Aviation Command.
The R.E.O.S. is the operational unit of helicopters in support of special forces composed of personnel specifically trained and equipped to support military activities in any operational context.
The stylized guards of the knife represent the wings present in the heraldic coat of arms of the unit. The steel used is the reliable Bölher N690Co heat treated to 58 HRC. Fiber Reinforced Nylon (FRN) polyamide polymer was chosen for the handle. The hybrid Kydex and fabric sheath is equipped with belt or harness attachment with MOLLE interface system.
It is available in two versions:
"ERMES SATIN ORDINANZA" with satin finish blade and ABS case.
"ERMES BLACK OPERATIVO", with the burnished blade.Intended use: Collection / Tactical
Production type: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58HRC
Blade Treatment: Satin finish
Handle: FRN (Fiberglass Reinforced Nylon)
Blade length: 140mm.
Blade thickness: 6.3mm.
Total length: 256mm.
Weight: 229g.
Sheath: Kydex and Fabric with MOLLE type hooking system.
Package: Commemorative case in ABS with the logos of the department
Notes: Commemorative knife developed in collaboration with the Regiment Helicopters for Special Operations (R.E.O.S.)ER-ERM-OR -
ExtremaRatio - Ermes - Operativo Black - knife
ERMES is the commemorative knife developed in collaboration with the Special Operations Helicopter Regiment (R.E.O.S.) which is part of the Army Aviation Command.
The R.E.O.S. is the operational unit of helicopters in support of special forces composed of personnel specifically trained and equipped to support military activities in any operational context.
The stylized guards of the knife represent the wings present in the heraldic coat of arms of the unit. The steel used is the reliable Bölher N690Co heat treated to 58 HRC. Fiber Reinforced Nylon (FRN) polyamide polymer was chosen for the handle. The hybrid Kydex and fabric sheath is equipped with belt or harness attachment with MOLLE interface system.
It is available in two versions:
"ERMES SATIN ORDINANZAR" with satin finish blade and ABS case.
"ERMES BLACK OPERATIVO", with the burnished blade.Intended use: Collection / Tactical
Production type: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58HRC
Blade Treatment: Burnishing Mil-C-13924
Handle: FRN (Fiberglass Reinforced Nylon)
Blade length: 140mm.
Blade thickness: 6.3mm.
Total length: 256mm.
Weight: 229g.
Sheath: Kydex and Fabric with MOLLE type hooking system.
Packaging: Cardboard box with Extrema Ratio logos.
Notes: Commemorative knife developed in collaboration with the Regiment Helicopters for Special Operations (R.E.O.S.)ER-ERM-OP -
ExtremaRatio - Selvan Heavy Utility Survival Knife in San Mai V-TOKU2 - Limited Edition - knife
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
ER-SEL-VT -
Knives.it by Simone Tonolli - Kydex Deep Carry sheath for Tengu Tactical knife - knife accessories
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 RatioKN-TENGU-K