Extrema Ratio Knives

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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
New
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

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

Folding knife Extrema Ratio BD2 Lucky Desert 0410000228DW 9.6cm
Folding knife Extrema Ratio BD2 Lucky Desert 9.6cm 0410000228DW
Extrema Ratio BD2 Lucky is a folding knife with a desert-colored handle and guard. The BD2 Lucky perfectly combines the elegance of classic Italian style and the functionality of an EDC knife. The ergonomic handle uses anodized aluminum alloy, and the blade is made of Böhler N690 cobalt steel. The guard also functions as a flipper.
€153.23

In stock

Folding knife Extrema Ratio Glauca J1 0410000165RVHCS 11cm
Folding knife Extrema Ratio Glauca J1 11cm 0410000165RVHCS
This folding knife Extrema Ratio Glauca J1 has been developed together with material experts of Jagdkommando Unit, the Austrian Army special force. The blade-tip is designed to maximize penetration. It also features a glass-breaker, a clip with three attach positions and a safety lock. Its handle is produced with a particular finishing, improving its grip. The desert kydex sheath is M.O.L.L.E. system compatible and accomodates the knife with its blade extended.
€441.94

In stock

Neck knife Extrema Ratio N.K.1 Desert Warfare 04.1000.0123/DW 5.1cm
Fixed blade Knife Extrema Ratio N.K.1 Desert Warfare 5.1cm 04.1000.0123/DW
Extrema Ratio N.K.1 Desert Warfare version. Extrema Ratio N.K.1 Black fixed is a reduced-size knife is based on the skinner and perfected to a true tactical knife. The design of the handle prevents accidental injury while drawing. A groove on the back of the blade accommodates for the user’s index finger or thumb, according to wielding style. Due to its overall construction, the N.K.1 is both capable of offense, through very effective slashing strikes, and useful for minute precision work. Total length 129 mm. Blade length 51 mm. Weight 56 g. The included, rapid- release Kydex sheath comes with a paracord strip for neck carry. Further, it can be attached via MOLLE system to tactical vests or to any of the compatible cordura sheaths from Extrema Ratio. Available but not included: belt clip (for attaching sheath to a belt), polymer under shirt system (for concealed carry). Available versions: N.K.1 Black, N.K.1 Desert Warfare, N.K.1 Stone washed.
€131.45

In stock

Folding knife Extrema Ratio BD2 R 04.1000.0227/SAT 9.6cm
Folding knife Extrema Ratio BD2 R 9.6cm 04.1000.0227/SAT
Extrema Ratio BD2 R is a medium folder of the BD series. Its handle produced in aluminum makes it light and resistant, also thanks to its steel internal frame. They keep all BD2 characteristics, improved with the new high speed Razor opening system.
€132.26

In stock

Folding knife Extrema Ratio BD1 R 0410000226SAT 7cm
Folding knife Extrema Ratio BD1 R 7cm 0410000226SAT
Extrema Ratio BD1 R is a knife designed for lightness. It is characterized by a very slim profile with a focus on lightness, without renouncing the usual Extrema Ratio toughness and reliability, also thanks to the black anodized, Anticorodal grip. The modified spearpoint, satin blade is made in Bohler N690 steel hardened to 58 HRC, 2.75” (70mm) 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. Scallops milled in the handle help to guarantee a solid grip on the knife and facilitate grip transitions. With an overall length of 6.7” (170 mm) and a weight of just 2.7 oz (75 g) the Extrema Ratio BD1 R is an extremely light and slim knife which makes it an ideal EDC choice.
€129.03

In stock

Folding knife Extrema Ratio MF2 Black Ruvido 04.1000.0142/RVB 11.3cm
Folding knife Extrema Ratio MF2 Black Ruvido 11.3cm 04.1000.0142/RVB
Extrema Ratio MF2 is a knife from the Medium Folders series. According to the Extrema Ratio classification, the Medium Folders series is located between Basic Folders (Light Folders) - simple, light and universal knives and Heavy Folders - heavy and powerful folding tools. Extrema Ratio MF2 Black Ruvido is a version with additional processing of the handle with a special polymer composition. Ruvido in Italian means "rough". The blade is made of BöHLER N690 STEEL (58HRC). The weight of the Extrema Ratio MF2 Black Ruvido knife is 194 g.
€307.26

In stock

Tactical knife Extrema Ratio Ermes Satin Ordinanza 0410000443SAT-OR 14cm
Fixed blade Knife Extrema Ratio Ermes Satin Ordinanza 14cm 0410000443SAT-OR
The Extrema Ratio Ermes is a commemorative knife with the satin-finished blade designed by the Special Operations Helicopter Regiment (R.E.O.S.), which is part of the Italian Army Aviation. R.E.O.S. is a helicopter operational unit supporting the special forces, composed of personnel specially equipped and trained to support hostilities in each operational context. The stylized knife guard represents the wings present in the regiment's heraldic symbol. Hybrid Kydex and fabric sheath has a belt attachment with MOLLE system.
€356.45

Shipping after 10-20 business days

Tactical knife Extrema Ratio Ermes Black Operativo 0410000443BLK-OP 14cm
Fixed blade Knife Extrema Ratio Ermes Black Operativo 14cm 0410000443BLK-OP
The Extrema Ratio Ermes is a full-black commemorative knife designed by the Special Operations Helicopter Regiment (R.E.O.S.), which is part of the Italian Army Aviation. R.E.O.S. is a helicopter operational unit supporting the special forces, composed of personnel specially trained and equipped to support hostilities in each operational context. The stylized knife guard represents the wings present in the regiment's heraldic symbol. Hybrid Kydex and fabric sheath has a belt attachment with MOLLE system.
€326.61

Shipping after 10-20 business days

Folding knife Extrema Ratio BD2 Lucky Black 0410000228BLK 9.6cm
Folding knife Extrema Ratio BD2 Lucky Black 9.6cm 0410000228BLK
Extrema Ratio BD2 Lucky is a fully black folding knife with guard. In addition to protecting the users's hands, the guard also acts as a flipper, and the high-speed auxiliary knife opening system makes it easy to use. The BD2 Lucky perfectly combines the functionality of an everyday pocket knife with the elegance of classic Italian style. The streamlined blade is made of Böhler N690 cobalt steel, and the ergonomic handle uses anodized aluminum alloy.
€160.48

In stock

Folding knife Extrema Ratio BD4 Lucky Desert 0410000497DW 12.3cm
Folding knife Extrema Ratio BD4 Lucky Desert 12.3cm 0410000497DW
Extrema Ratio BD4 Lucky is a folding knife with a partial serrated sharpening and a guard, made in a desert color. BD4 Lucky perfectly combines the elegance of classic Italian style and the functionality of a folding knife for every day. The guard also functions as a flipper, and the high-speed auxiliary opening system of the knife makes it easier to use. The ergonomic handle uses anodized aluminum alloy, and the blade is made of Böhler N690 cobalt steel.
€168.55

In stock

Folding knife Extrema Ratio BD4 Lucky Black 04.1000.0497/BLK 12.3cm
Folding knife Extrema Ratio BD4 Lucky Black 12.3cm 04.1000.0497/BLK
Extrema Ratio BD4 Lucky is a folding knife with a guard and a partial serrated sharpening, made entirely in black. The guard also acts as a flipper, and the high-speed auxiliary knife opening system makes it easy to use. The BD4 Lucky perfectly combines the elegance of classic Italian style with the functionality of a EDC folding knife. The streamlined blade is made of Böhler N690 cobalt steel, and the ergonomic handle uses anodized aluminum alloy.
€179.84

In stock

Folding knife Extrema Ratio Panthera Black 0410000135BLK 10cm
Folding knife Extrema Ratio Panthera Black 10cm 0410000135BLK
Extrema Ratio Panthera is a fully black folding knife. This model has absolutely identical characteristics to the T-Razor model, because it is from which Panthera draws inspiration. The difference in this silhouette is that the dorsal part, like in the blades of the Wharncliffe, goes down to the tip of the knife. The Extrema Ratio Panthera features a Razor-called high-speed assisting deployment system, which makes the knife easier to use.
€188.71

In stock

Folding knife Extrema Ratio Panthera Satin 0410000135SAT 10cm
Folding knife Extrema Ratio Panthera Satin 10cm 0410000135SAT
Extrema Ratio Panthera with a satin-finished blade. The model retains all the characteristics of the T-Razor Extrema Ratio model, from which Panthera draws inspiration. The difference in this silhouette is that the dorsal part descends to the tip of the knife, similar to Wharncliffe blades. The Extrema Ratio Panthera features a high-speed assisting deployment system called the Razor, which makes the knife easier to use.
€204.03

In stock

Folding knife Extrema Ratio Resolza 10 Stone washed 04.1000.0168/SW 10cm
Folding knife Extrema Ratio Resolza 10 Stone washed 10cm 04.1000.0168/SW
Extrema Ratio Resolza 10 is a folding knife with stonewashed blade that pays homage to centuries of tradition of Italia. The traditional Sardinian resolza is one of the most famous Italian knives. So far it is a constant companion of island farmers and shepherds in their daily work. The knife accompanied them even when people were called to war: during the World War I in the chronicles of Sassari the knife is mentioned as part of equipment of soldiers. Resolza 10 is an attempt to redefine the traditional silhouette in accordance with the modern Extrema Ratio standards, so as not to overlook the Sardinian craftsmen, who still preserve ancient traditions and practice ingrained knife-making techniques. Resolza 10 retains its original dimensions and proportions, but is manufactured using modern company technologies and high quality materials. The handle has been redesigned, and the blade is more closely approximated to the traditional shape.
€154.84

In stock

Folding knife Extrema Ratio Resolza 10 Black 04.1000.0168/BLK 10cm
New
Folding knife Extrema Ratio Resolza 10 Black 10cm 04.1000.0168/BLK
Extrema Ratio Resolza 10 is a folding knife that pays homage to centuries of Italian tradition. The traditional Sardinian resolza is one of the most famous knives in Italy. To this day, it is a constant companion of island farmers and shepherds in their daily work. The knife accompanied them even when people were called to war: in the chronicles of Sassari during the First World War, the knife is mentioned as part of soldiers' equipment. Resolza 10 is an attempt to redefine the traditional silhouette in accordance with the modern Extrema Ratio standards, so as not to overlook the Sardinian craftsmen, who still practice ingrained knife-making techniques and preserve ancient traditions. Resolza 10 retains its original dimensions and proportions, but is manufactured using high quality materials and modern company technologies. The handle has been redesigned, and the blade is more closely approximated to the traditional shape.
€159.68

In stock

Folding karambit knife Extrema Ratio Nightmare Stonewashed 04.1000.0454/SW 7.3cm
Folding knife Extrema Ratio Nightmare Stonewashed 7.3cm 04.1000.0454/SW
Extrema Ratio Nightmare is a karambit folding knife with rescue characteristics. It has been adopted by the special units of U.S.I.V.P. Principality of Monaco Police. Its name comes from the development and consultancy department of Monaco special intervention units. It comes with a standard industrial-grade cutter blade which is easily replaced, a reversable pocket clip, a glass braker placed in the finger ring. It is produced both in black and stone washed version.
€241.94

In stock

Folding knife Extrema Ratio Glauca B1 04.1000.0139/BLK 10.7cm
Folding knife Extrema Ratio Glauca B1 10.7cm 04.1000.0139/BLK
This new folding knife comes out from a cooperation and planning phase with G.I.G.N. (special unit of the French national Gendarmerie). To maximize penetration, a special blade tip has been developed. On the back side of the handle it has a special tool to cut plastic handcuffs. It comes with a rear glass breaker, reversible clip and safety lock. The sheath has a hard ABS structure on a cordura basis and it has several possible ways of fixing: MOLLE system for tactical jackets, belt fixing and side fixing. The sheath is planned to be used with open blade knife.
€459.68

Shipping after 10-20 business days

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.