Extrema Ratio Knives

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Folding knife Extrema Ratio BDØ R HCS
Folding knife Extrema Ratio BD0 R HCS 6cm 0410000459HCS
BD0 R HCS from Extrema Ratio is a new knife designed for lightness. It is characterized by a very slim profile with a focus on lightness. The blade is made in Bohler N690 steel hardened to 58 HRC, 2.36” (60mm) long, 0.1” (2.5 mm) thick, with a plain sharpening and a faux edge on the first third of the spine. The blade is deployed by the usual “Razor” tang extension which enables effortless ambidextrous operation. A simple yet sturdy liner lock system holds the blade open. The reversible clip with lightening holes contributes to maintain the weight of the knife to a minimum. With an overall length of 5.7” (165 mm) and a weight of just  52 g the Extrema Ratio BD0 R is an extremely light and slim knife which makes it an ideal EDC choice.
€78.23

In stock

Folding knife Extrema Ratio BDØ R Desert
Folding knife Extrema Ratio BD0 R Desert 6cm 0410000459DW
Extrema Ratio BDØ R Desert  is a new knife designed for lightness. It is characterized by a very slim profile with a focus on lightness. The blade is made in Bohler N690 steel hardened to 58 HRC, 2.36” (60mm) long, 0.1” (2.5 mm) thick, with a plain sharpening and a faux edge on the first third of the spine. The blade is deployed by the usual “Razor” tang extension which enables effortless ambidextrous operation. A simple yet sturdy liner lock system holds the blade open. The reversible clip with lightening holes contributes to maintain the weight of the knife to a minimum. With an overall length of 5.7” (165 mm) and a weight of just  52 g the Extrema Ratio BDØ R is an extremely light and slim knife which makes it an ideal EDC choice.
€73.39

In stock

Folding knife Extrema Ratio MF2 Black
Folding knife Extrema Ratio MF2 Black 11.3cm 0410000142BLK
Tactical folding knife Extrema Ratio MF2 Black with a blade length of 11.3 cm. Model MF2 features twin guards, making the grip extremely stable and preventing any event of a user’s hand slipping onto the blade. The blade-mounted guard enables quick opening with the index finger. 
€295.97

In stock

Survival knife Extrema Ratio RAO Desert Warfare
Survival knife Extrema Ratio RAO Desert Warfare 11.9cm 0410000141DW
Tactical folding knife Extrema Ratio RAO Desert Warfare with a blade length of 11.9 cm. In June 2006, the “185° Rgt. Ricognizione e Acquisizione Obiettivi” (Target Acquisition Regiment) airborne “FOLGORE” (185° RAO) entrusted to Extrema Ratio the development of a unique knife fitting the unit’s specific operational duties. This resulted in the RAO: a compact survival & field knife, with a heavy and dependable blade. Its very reliable locking system, assisted by an extra safety device, effectively turns this folder into a fixed blade knife. The opening and closing is to be performed with both hands in order to minimize the risk of self-inflicted injuries, as the blade, because of its weight, is a veritable guillotine. The extra safe device is a steel pin to be hand-screwed through two holes by the guard section of the massive Anticorodal aluminum handle. The sheath can be attached to tactical vests or common belts, being MOLLE system--compliant.
€345.16

In stock

Tactical knife Extrema Ratio Fulcrum
Fixed blade Knife Extrema Ratio Fulcrum E.I. 18cm 0410000082BLK-EI
 Extrema Ratio Fulcrum E.I. has black 18 cm blade  made of Bohler N690 steel. The blade can sustain loads of over 150 kilograms without breaking. The tanto-shaped blade allows for large amounts of work and wear while still retaining a sharp, penetrating edge at its exceedingly sturdy tip. Thanks to its weight and top-heavy balancing, the Fulcrum is also suitable for hard work on the field. 
€299.19

In stock

Tactical knife Extrema Ratio 39-09 Ordinanza COFS
Fixed blade Knife Extrema Ratio 39-09 Ordinanza COFS 19.5cm 0410000339BLK-OR
Extrema Ration 39-09 Ordinanza is the result of a project sponsored by COFS (the inter-force operations command for Italian special forces) and its former Commander-in-chief, Gen. Bertolini. This combat knife 39-09 is a restyling of the Model 1939 “paracadutista assaltatore” (assault paratrooper) knife, a celebrated piece of Italian military history. Small changes which make it a highly effective, dependable dagger. The included hard sheath is designed to be worn at the ankle, in the characteristic fashion of Italian paratroopers. The 39-09 Ordinanza version has Forprene handle, black oxide-coated with COFS logo & motto. It comes in ABS engraved case with an ankle sheath and a parade belt sheath. Weight  338 g (11.9 oz)
€496.39

In stock

Tactical knife Extrema Ratio Pugio Desert Warfare 0410000314DW 11cm
Fixed blade Knife Extrema Ratio Pugio Desert Warfare 11cm 0410000314DW
Though named after a short and pointed Roman dagger,  Extrema Ratio Pugio Desert Warfare sports a cuttlebone-shaped hilt reminiscent of the longer Caucasian knives. Ir’s a boot dagger, a delf-defense backup weapon excellently suited for concealed carry. The blade is hollow ground, while absence of guard prevents accidental entanglement in close quarters. Includes an easy-locking BELT-CLIP hard sheath, adjustable for carrying the knife vertically, horizontally or obliquely (at a 45° angle).
€263.71

In stock

Tactical knife Extrema Ratio K1 Dobermann XXV Anniversarium
Fixed blade Knife Extrema Ratio K1 Dobermann XXV Anniversarium 21cm 0410000105XXVSE
The Tactical knife Extrema Ratio K1 Dobermann XXV Anniversary has a modified Spear point blade, whose tip is a combination of tanto style at 40° and a more traditional European style, resulting in a very sharp but solid hybrid. It also has a sharp false edge that makes it very effective at thrusting. It has a high bevel that allows a very efficient cutting edge.This special edition of 250 pieces, designed for the 25th anniversary of the brand, maintains the shape of the original knife but with up-to-date materials and finishing. The blade is made of Böhler N690 steel, heat treated at 58 HRC, to reach the best combination of edge retention and resistance. It has a satin finish and a flat grind. The Anticorodal anodized handle has a lighter design compared to its original – a design that characterises Extrema Ratio knives – but it keeps the arched shape and the lateral “bump” of the K1, allowing an excellent grip in bot saber and reverse mode. The bottom part of the handle is curved to create a sort of hook for easily and rapidly pulling the knife out of the sheath, whereas the pommel stick out as a triangular glass breaker that can become a lanyard hole. The leather sheath is the exact replica of the original, retaining its features of rapid and easy extraction. The knife can be carried upwards underarm, horizontally with a belt or tactically in the leg. K1 comes with a Polypropylene case, a complete leather sheath and a shoulder strap to carry the knife underarm. Weight is 493 gr.
€748.00

In stock

Multi-tool Extrema Ratio TK Tool 2.0 Black tktoolblack 10cm - 1
Multi-tool Extrema Ratio TK Tool 2.0 Black 10cm 04.1000.0050/BLK
A multifunctional tool with a basic and essential design, jointly developed with military professionals. It features a special tip useful for adjusting and calibrating firearm optics. The front of a TK TOOL 2.0 can be used as a screwdriver suitable for 8/10 mm screws, or as a prying lever. The central slot in the blade can be used as a shackle key. This tool has also features two holes for a cord or paracord used in assembling a field or camping tent. Overall, a much sought-after tool for a number of outdoor activities. MOLLE system compliant
€65.32

In stock

Folding knife Extrema Ratio MF2 Desert Warfare 04.1000.0142/DW 11.3cm
Folding knife Extrema Ratio MF2 Desert Warfare 11.3cm 04.1000.0142/DW
Extrema Ratio MF2 features twin guards, making the grip extremely stable and preventing any event of a user’s hand slipping onto the blade. The blade-mounted guard enables quick opening with the index finger. MF2 ORDINANZA COL MOSCHIN is the version issued to 9th Parachute Assault Regiment “Col Moschin”: decorated with regimental logos, it comes in an engraved ABS case
€336.29

In stock

Tactical knife Extrema Ratio A.S.F.K. 04.1000.0438/BLK 16.2cm
Fixed blade Knife Extrema Ratio A.S.F.K. 16.2cm 04.1000.0438/BLK
A.S.F.K. is a dagger dedicated to and adopted by the new Comando Forze Speciali Esercito Italiano (Italian Special Forces). A.S.F.K. revives the Arditi tradition and cold weapon assaults which are characteristic of trench warfare. A.S.F.K. is a contemporary interpretation of the famous trench knife. It comes with N690 Böhler steel blade, forprene handle and a ring guard for hand protection while using it as a glass breaker.
€338.71

Shipping after 10-20 business days

Tactical knife Extrema Ratio Col Moschin C Desert Warfare
Fixed blade Knife Extrema Ratio Col Moschin C Desert Warfare 11cm 0410000200DW
The great Extrema Ratio Col Moschin C Desert Warfare is a compact version of the Col Moschin. The Col Moschin is made for the 9th Parachute Assault Regiment "Col Moschin" of the Italian special forces. It is a modern interpretation of a dagger that was presented to the Arditi: a military force from history, in whose footsteps the 9th is following. It has a unique, distinctive blade shape. It comes with hard belt sheath and belt-clip. The sheath can be worn vertically, horizontally or obliquely (at a 45° angle).
€224.19

In stock

Tactical knife Extrema Ratio Col Moschin C Black
Fixed blade Knife Extrema Ratio Col Moschin C Black 11cm 0410000200BLK
The tactical knife Extrema Ratio Col Moschin C Black. The blade is 5 cm shorter than that of its bigger brother. The Col Moschin is made for the 9th Parachute Assault Regiment "Col Moschin" of the Italian special forces. It is a modern interpretation of a dagger that was presented to the Arditi: a military force from history, in whose footsteps the 9th is following. It has a unique, distinctive blade shape. It comes with hard belt sheath and belt-clip. The sheath can be worn vertically, horizontally or obliquely (at a 45° angle).
€221.77

Shipping after 10-20 business days

Folding knife Extrema Ratio Frame Rock Titan Blue Satin 04.1000.0456/SAT/BLU 7.5cm
Folding knife Extrema Ratio Frame Rock Titan Blue Satin 7.5cm 04.1000.0456/SAT/BLU
Extrema Ratio Frame Rock Titan Blue is a stylish folder with a blue titanium handle that offers high strength and at the same time a lightweight construction. Spear point blade 75 mm is made of high quality Bohler N690 steel, satin finish. The handle is equipped with a pocket clip. Opening the blade is smooth and easy thanks to the bearings. This mechanism allows the user to adjust the force required to release the blade with the screw. Framelock. The knife weighs about 270 g. Made in Italy.
€466.13

In stock

Folding knife Extrema Ratio MF2 Ordinanza Col Moschin
Folding knife Extrema Ratio MF2 Ordinanza Col Moschin 11.3cm 0410000142BLK-OR
Tactical folding knife Extrema Ratio MF2 Ordinanza Col Moschin features twin guards, making the grip extremely stable and preventing any event of a user’s hand slipping onto the blade. The blade-mounted guard enables quick opening with the index finger. MF2 Ordinanza col Moschin is the version issued to 9th Parachute Assault Regiment “Col Moschin”: decorated with regimental logos, it comes in an engraved ABS case.
€342.74

In stock

Folding knife Extrema Ratio BF1 CD Desert warfare
Folding knife Extrema Ratio BF1 CD Desert warfare 6.9cm 0410000143DW
The Extrema Ratio BF1 CD Desert warfare is a folding knife for everyday use: simple, essential and functional. The blade is burnished, with a flat grind and a thick, durable tip. Characteristical lowered flat areas in the handle give access to the opening “pins”, which don’t protrude from the knife when closed. The reversible clip is located on the back of the blade and engulfs its tang – making it discreet to carry. Employs the trustworthy Liner-Lock blade blocking system.
€152.42

In stock

Folding knife Extrema Ratio BF1 CT Desert Warefare 04.1000.0144/DW 6.9cm - 1
Folding knife Extrema Ratio BF1 CT Desert Warefare 6.9cm 04.1000.0144/DW
Extrema Ratio BF1 CT Desert Warefare with tanto blade. BF1 is a folding knife for everyday use: simple, essential and functional. The blade is burnished, with a flat grind and a thick, durable tip. Characteristical lowered flat areas in the handle – also burnished black give access to the opening “pins”, which don’t protrude from the knife when closed. The reversible clip is located on the back of the blade and engulfs its tang – making it discreet to carry. Employs the trustworthy LINER-LOCK blade blocking system. Available versions: BF1 CT BLACK, BF1 CT BLACK ROUGH, BF1 CT DESERT WARFARE, BF1 CD BLACK, BF1 CD BLACK ROUGH, BF1 CD DESERT WARFARE.
€152.41

In stock

Fixed blade Knife Extrema Ratio Satre Stone Washed
Fixed blade Knife Extrema Ratio Satre Stone Washed 7cm 0410000222SW
This Extrema Ratio Satre Stone Washed was designed in collaboration with Daniele Dal Canto, a Master Advanced F.I.S.S.S. instructor (Italian Federation of Sport and Experimental Survival). The Satre is made with heat-treated Böhler N690 steel at 58 HRC. This material was chosen for its resistance to oxidation, for the durability of its edge and especially for its reliability, which has been proven over the years. Given its characteristics, it can be employed in a large variety of activities and fields, including survival and bushcraft, or it can be part of an EDC. It can be worn as a neck knife thanks to its Paracord 550 lanyard. The full-tang skeletonized structure allows the customization of the knife by using the Paracord as an handle cover.
€117.74

In stock

Karambit knife Extrema Ratio K -Talon Stone Washed
Fixed blade Knife Extrema Ratio K-Talon Stone Washed 7cm 0410000224SW
The Extrema Ratio K -Talon Stone Washed is a fixed-blade karambit with a full-tang structure. The curved and hooked blade was inspired by the shape of a talon. It is designed to make clear and deep cuts as well as to hook, seize and/or tear. The ring in the back is built to gain a safe and firm grip in every situation. This way the knife does not slip and it makes it extremely difficult to disarm and point at the user.The very thin Kydex sheath has a quick release system and comes with a paracord that allows it to be worn as a neck knife and to be attached to the M.O.L.L.E. system.
€222.28

In stock

Karambit knife Extrema Ratio K -Talon Dark Stone
Fixed blade Knife Extrema Ratio K-Talon Dark Stone 7cm 0410000224DKS
The Extrema Ratio K-Talon Dark Stone  is a fixed-blade karambit with a full-tang structure. It has a particularly thin shape with a thickness of only 10 mm including sheath and scales. The curved and hooked blade was inspired by the shape of a talon. It is designed to make clear and deep cuts as well as to hook, seize and/or tear. The ring in the back is built to gain a safe and firm grip in every situation. This way the knife does not slip and it makes it extremely difficult to disarm and point at the user.The very thin Kydex sheath has a quick release system and comes with a paracord that allows it to be worn as a neck knife and to be attached to the M.O.L.L.E. system.
€229.40

In stock

Tactical knife Extrema Ratio DMP Black 0410000219BLK 15.2cm
Fixed blade Knife Extrema Ratio DMP Black 15.2cm 0410000219BLK
DMP is a multipurpose knife characterized by a remarkable versatility of use thanks also to its middle size. The drop point blade with a reinforced tip is particularly useful for the hardest use. The full flat grinding gives excellent cutting characteristics. The sheath is minimalist; most of the fabric has been cut off; it has got a 2nd level retention system, remembering the style of the model it was inspired by. The main shell is injection-molded in shockproof nylon. The secondary retention system is reversible for ambidextrous users. The DMP model is available in Black, Desert, HCS, Ranger Green, Wolf Gray versions.
€241.40

In stock

Machete Extrema Ratio KS 0410000172BLK 24.3cm
Machete Extrema Ratio KS 24.3cm 0410000172BLK
Made famous by the Gurkha regiments serving under the British crown, the “kukri” is a Nepalese all-purpose blade descended from ancient Greek sickle-shaped swords. It’s ultimately a machete with a top-heavy, forward-positioned cutting edge, which enables it to function as an axe while retaining the versatility of a long blade. Extrema Ratio has developed two such tools, our KS and KH models, blending ancient and modern design concepts. Both employ combination grinds. The razor-like hollow grind closer to the grip yields a fine, sharp edge without compromising the overall thickness of the back of the blade (which needs great sturdiness). The tip portion of the blade is instead flat ground, well-angled to effortlessly penetrate wood and vegetation. While similar tools are usually made from softer steel alloys for elasticity and ease of honing, we were able to achieve adequate elasticity using hard BÖHLER N690 steel, making for a remarkably durable edge.
€346.77

In stock

Folding knife Extrema Ratio T911 04.1000.0164/SW 7.6cm
Folding knife Extrema Ratio T911 7.6cm 04.1000.0164/SW
Extrema Ratio T911 folder is a light, medium sized folding knife, designed for professional use by military operators. It features a Bohler N690 cobalt steel modified spearpoint blade heat treated to 58 HRC for best compromise between toughness, ease of sharpening and edge retention.
The blade is 76 mm (3”) long and 4 mm (0.16”) thick, with a stone washed finish and flat edge, and rotates around a pin that can be adjusted for tension, allowing the user to achieve the desired smoothness while deploying the blade. Once adjusted, a secondary screw locks the pin in position.
The handle is hard anodized Anticorodal aluminum alloy, with a black finish, shaped for ease of transition between reverse and saber grip. The blade deploys from the folded position by the usual thumb stud and is secured by a liner lock with an additional safety system to insure maximum reliability under hard use. The safety lever is red colored for better visibility and engages the safety in its forward position for a more instinctive use.
The handle has an integrated belt cutter with easily available industrial grade cutter blades, tungsten carbide glass breaker, a stainless-steel folding marlin-spike and a flat screwdriver in AISI 420 steel, meant to help in rifle scope adjustment. A clip is fixed at the end of the handle, allowing for a deep, concealed carry position with very little of the knife exposed. The clip can be reversed from left to right side. Overall 194 mm. Weight 145 g. Made in Italy.
€258.87

In stock

Extrema Ratio knives are a part of equipment of many special military units of Italy, the police and rescue services. Each model is developed very carefully and undergoes a series of rigorous tests before it is put into production. Extrema Ratio cooperates with the University of Perugia, where scientists conduct a number of studies determining the ergonomics of Extrema Ratio products and methods for improving it. The office of Extrema Ratio is located in Prato, Italy. Both Extreme Ratio tactical knives and EDC knives are distinguished by impeccable quality. Most knives are made of Austrian steel N690, which is famous for its high content of molybdenum and cobalt and is highly corrosion resistant. Due to this, N690 steel has increased strength and resists shock loads well. The most popular Extrema Ratio knives are Fulcrum, Col Moschin, RAO, Adra and others. Extrema Ratio also produces several lines of tactical folding knives: BF (basic folder), MF (medium folder), BD4, BD2 series and other knives. In our store you can buy Extrema Ratio tactical knives, as well as folding and EDC knives of this brand. MyGoodKnife is the official distributor of Extrema Ratio.