Extrema Ratio Knives

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Fixed blade Knife Extrema Ratio Herring NE 16.7cm 04.1000.0319/BL-OR-N
Extrema Ratio Herring is one of the fan favorite military daggers. The dagger that entered the history of Italy during the World War II, thanks to the deeds of the young soldiers of the 1st Reconnaissance Squadron Folgore, armed with this weapon during Operation Herring. Extrema Ratio wanted to pay homage to this dagger while retaining the original design using most modern production techniques. The unique handcrafted finish on the handle mimics the aging of brass and gives the dagger a vintage look. The Herring NE version has an unsharpened cutting edge, which allows you to safely store this dagger.
€456.45

In stock

Folding knife Extrema Ratio BD2 Lucky Black 9.6cm 04.1000.0228/BLK
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.
€133.87

In stock

Folding knife Extrema Ratio BD4 Lucky Desert 12.3cm 04.1000.0497/DW
Extrema Ratio BD4 Lucky is a semi-serrated folding knife with a guard. The BD4 Lucky perfectly combines the elegance of classic Italian style with the functionality of a day-to-day folding knife. The guard also acts as a flipper, and the high-speed auxiliary knife opening system makes it easy to use. The ergonomic tan-colored handle uses anodized aluminum alloy and the stonewashed streamlined blade is made from Böhler N690 cobalt steel.
€145.16

In stock

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.
€152.42

In stock

Folding knife Extrema Ratio MF0 T Black 6.8cm 04.1000.0148/BLK
Extrema Ratio MF0 is a multifunctional folding knife, which is the lightest model in the MF (Medium Folder) line. The knife retains all the characteristics of the MF1, being in fact a smaller version of it. The knife is equipped with a 7 cm blade. The knife blade is made of Austrian alloy steel Böhler N690 (58 HRC), traditional for Extrema Ratio.
€233.87

In stock

Folding knife Extrema Ratio Panthera Black 10cm 04.1000.0135/BLK
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 10cm 04.1000.0135/SAT
Extrema Ratio Panthera is a satin-finished folding knife. The model retains all the characteristics of the T-Razor 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 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.
€149.19

In stock

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.
€145.16

In stock

Folding knife Extrema Ratio BD4 R Satin 12.2cm 04.1000.0496/SAT
Extrema Ratio BD4 R is a basic folding knife with a satin-finished blade. The high-speed auxiliary knife opening system makes it easy to use. The BD4 R perfectly combines the elegance of classic Italian style with the functionality of an EDC folding knife. The streamlined blade is made of Austrian Böhler N690 steel, and the ergonomic handle uses anodized aluminum.
€142.74

In stock

Fixed blade Knife Extrema Ratio MK2.1 Black 17.7cm 04.1000.0128/BLK
Extrema Ratio MK2.1 is a re-issue of the Mark 2 combat dagger, one of the most common knives during World War II. The aim was to preserve the characteristic properties of the original, making only those changes that would increase its effectiveness. The blade is made of Böhler N690 cobalt steel, the rest of the parts are made of AISI 303 and AISI 304, and the handle uses fiberglass-reinforced nylon instead of leather. The MK2.1 retains the ergonomics of the original Mark 2, while all of the frame parts have been enlarged to provide a robust, high-performance multi-tool. The most significant changes are aimed at eliminating the known "weak points" of the original knife: the ability to disassemble in the field without the tools, a straightened modified Bowie profile, which makes it easier to maintain the edge, and recesses on the handle that help to correctly orient the blade in the dark and increase the grip during rotational movements. Lanyard hole and front guard holes have also been added. The kit includes a standard hip-mount sheath.
€320.97

In stock

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.
€326.61

In stock

Folding knife Extrema Ratio Nightmare Stonewashed 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.
€207.26

In stock

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.
€420.16

In stock

Fixed blade Knife Extrema Ratio N.K.1 Black 5.1cm 04.1000.0123/BLK
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.
€108.06

In stock

Survival knife Extrema Ratio Ontos Black No Kit 16.8cm 04.1000.0127/BLK-NK
Extrema Ratio Ontos Black fixed is a survival tool for all seasons. ONTOS (“the thing” in Greek) is a pure field knife, tough and heavyweight despite its compact size. The serrated segment on the back of the blade is meant as a back-up, never to be caught without a sharp edge ready for use. The MOLLE compatible nylon thigh sheath stays on even in the event of a retreat, when a soldier would drop most of his cumbersome primary equipment. It is possible to buy separately a survival kit to be fixed to knife sheath. Total length 299 mm. Blade length 168mm. Weight 411g. Available versions: ONTOS Black, ONTOS Green. 
€314.52

In stock

Folding knife Extrema Ratio MF0 D Black Rough 6.8cm 04.1000.0140/RVB
Extrema Ratio MF0 D Black Rough folder is “the little one” amongst MF knives. Basically it is a compact version of the MF1. It retains all the characteristics of MF1 but has a downsized handle and shortened blade, similar to our SHRAPNEL “back-up” knife. This versione is produced with a rough handle for a better grip. The drop point blade 68 mm is made of Bohler N690 stainless steel (58HRC). Black aluminum handle. 
MF stands for Medium Folder: a product line positioning itself between the BF (Basic Folder) and the Heavy Folder lines. MF knives employ the LINER-LOCK mechanism and are distinguished for their sturdiness; all are equipped with a glass-breaker. An innovative supplementary screw can be unlocked to enable fine-tuning of the main screw, adjusting opening speed to taste. Hemispheric milling marks on handles make it easier to change from saber-style to reverse grip. Clips are reversible. Overall length 181 mm. Weight 139 g. Made in Italy.
€233.87

In stock

Diving knife Extrema Ratio Ultramarine Con Asola 15cm 04.1000.0320/BLK
Extrema Ratio ULTRAMARINE is an amphibious knife, carried around from underwater operation equipment (diving suit) to ground operation equipment (tactical vest). Can be shipped only inside EU. Two different versatile sheaths were therefore developed for it. The scuba sheath can be worn at the ankle, or its hard ABS section can be attached by two BELT-CLIPS to either the breathing apparatus or BCD belts. The land sheath (OPTIONAL, included on request) is MOLLE system compatible, designed to be attached to the tactical vest and carried inside a waterproof bag during underwater operations. All an operative has to do, if getting rid of his diving suit after landing, is to draw the knife from its ankle sheath and place it in the tactical vest sheath. Primary functions: field operations, underwater operations, emergency tool, survival and combat.
€510.48

In stock

Fixed blade Knife Extrema Ratio Contact Black 16.2cm 04.1000.0215/BLK
Contact is a first knife of Extrema Ratio new production line. It has a blade with a lance-shaped profile, a flat grinding and a diamond-shaped geometry. Contact has got a lower guard branch to protect the hand from accidental cuts, upper jumping to improve grip, a concave fuller along the entire length of the blade and a generous thickness blade (6.30mm) All these details make the Contact the elder brother of the now famous Requiem, revisited in proportions and in some technical features. The blade is made in Böhler N690 steel with a hardness of 58 HRC and a chemical burnishing coating for the Black version. 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.
€246.77

In stock

Training knife Extrema Ratio TK KS 24.1cm 04.1000.0172-TK
Training knife Extrema Ratio kukri KS. Extrema Ratio restyled series of training knives are manufactured in a wide range of models of diverse size and shape. They enable martial arts practitioners and professionals to train different combat techniques with an appropriate and dedicated tool. All training knives are produced in a metallic blue colour which makes them easily identified even when sheathed. The blades are produced from anodized aluminum and have the very same shape and size of the Extrema Ratio standard production models. The handles are the same used in our production models. The sheaths, sold separately, are the same used for the real knives. The stiff blade allows for training complex defensive and disarming techniques. We recommend the use of appropriate protective gear when training.
€46.77

In stock

Training knife Extrema Ratio TK BF2 8.9cm 04.1000.0145-TK
Training knife Extrema Ratio BF2. Extrema Ratio restyled series of training knives are manufactured in a wide range of models of diverse size and shape. They enable martial arts practitioners and professionals to train different combat techniques with an appropriate and dedicated tool. All training knives are produced in a metallic blue colour which makes them easily identified even when sheathed. The blades are produced from anodized aluminum and have the very same shape and size of the Extrema Ratio standard production models. The handles are the same used in our production models. The sheaths, sold separately, are the same used for the real knives. The stiff blade allows for training complex defensive and disarming techniques. We recommend the use of appropriate protective gear when training.
€22.26

In stock

Folding knife Extrema Ratio Nightmare Black 7.3cm 04.1000.0454/BLK
Extrema Ratio is proud to present the new development of 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.
€232.26

In stock

Survival knife Extrema Ratio Ontos Green No Kit 15.9cm 04.1000.0127/GRN-NK
Growing demand from the professionals amongst our clients persuaded Extrema Ratio to design a survival tool for all seasons. ONTOS (“the thing” in Greek) is a pure field knife, tough and heavyweight despite its compact size. The serrated segment on the back of the blade is meant as a back-up, never to be caught without a sharp edge ready for use. The MOLLE compatible nylon thigh sheath stays on even in the event of a retreat, when a soldier would drop most of his cumbersome primary equipment. It is possible to buy separately a survival kit to be fixed to knife sheath. Available versions: ONTOS BLACK, ONTOS GREEN.
€301.53

In stock

Training knife Extrema Ratio TK Col Moschin 14.4cm 04.1000.0125-TK
Extrema Ratio restyled series of training knives are manufactured in a wide range of models of diverse size and shape. They enable martial arts practitioners and professionals to train different combat techniques with an appropriate and dedicated tool. All training knives are produced in a metallic blue colour which makes them easily identified even when sheathed. The blades are produced from anodized aluminum and have the very same shape and size of the Extrema Ratio standard production models. The handles are the same used in our production models. The sheaths, sold separately, are the same used for the real knives. The stiff blade allows for training complex defensive and disarming techniques. We recommend the use of appropriate protective gear when training.
€40.32

In stock

MyGoodKnife is official retailer of Extrema Ratio. Located in Prato, Italy, Extrema Ratio has been designing, manufacturing and selling high performance combat knives since 1997 enjoying a reputation for excellence that is unsurpassed in the military and tactical knife industry. Extrema Ratio prides itself in design, material and quality to deliver a high end product that meets the most severe mil-standards. The production based on modern cutting edge technology is combined with traditional craftsmanship and the result is the pinnacle of this synthesis. The Extrema Ratio design team uses the 3D system to design new models and create prototypes. Each knife design is then meticulously inspected and then field tested. At this point the finest materials are chosen for durability, function and beauty. Each knife is then hand assembled and hand finished and inspected by Extrema Ratio team of craftsmen. First class handwork and well-selected material have contributed to form the image of the Extrema Ratio trademark all over the world. Each knife that is manufactured at Extrema Ratio has measured up to the Company rigorous standards for quality and performance. The knives are the result of painstaking research and development. This is an Extrema Ratio hallmark. Extrema Ratio knives represent a real, solid value for the money.