Extrema Ratio

Extrema Ratio è un marchio italiano di coltelli tattici, fondato nel 1997. L'azienda sviluppa coltelli per uso militare, di polizia, di soccorso e per attività outdoor. Extrema Ratio è fornitore ufficiale delle forze armate e di sicurezza italiane, è certificata ISO 9001 e possiede il codice fornitore NATO.

Puoi acquistare coltelli Extrema Ratio originali su MyGoodKnife: il nostro negozio è rivenditore ufficiale del marchio. La nostra selezione comprende coltelli tattici pieghevoli e coltelli a lama fissa delle serie più popolari di Extrema Ratio: Col Moschin, Fulcrum, RAO, Caimano Nero, Dobermann, Selvans, Misericordia, S-THIL e altre.

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Tactical knife Extrema Ratio Col Moschin C Desert Warfare
Coltello Fisso 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 magazzino

Tactical knife Extrema Ratio Col Moschin C Black
Coltello Fisso 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 €

Spedizione dopo 10-20 giorni lavorativi

Coltello da tasca Extrema Ratio Frame Rock Titan Blue Satin 04.1000.0456/SAT/BLU 7.5cm
Coltello da tasca 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 magazzino

Folding knife Extrema Ratio BF1 CT Desert Warefare 04.1000.0144/DW 6.9cm - 1
Coltello da tasca Extrema Ratio BF1 CT Desert Warefare 6.9cm 04.1000.0144/DW
Extrema Ratio BF1 CT Desert Warefare con lama tanto. BF1 è un coltello chiudibile per l'uso quotidiano: semplice, essenziale e funzionale. La lama è brunita, con affilatura piatta e punta spessa e resistente. Le caratteristiche zone piatte ribassate nell'impugnatura, anch'esse brunite nere, danno accesso ai "perni" di apertura, che non sporgono dal coltello quando è chiuso. La clip reversibile è posizionata sul dorso della lama e ne avvolge il codolo, rendendolo discreto da portare. Utilizza l'affidabile sistema di blocco lama LINER-LOCK. Versioni disponibili: 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 magazzino

Fixed blade Knife Extrema Ratio Satre Stone Washed
Coltello Fisso 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 magazzino

Karambit knife Extrema Ratio K -Talon Stone Washed
Coltello Fisso 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 magazzino

Karambit knife Extrema Ratio K -Talon Dark Stone
Coltello Fisso 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 magazzino

Macete Extrema Ratio KS 0410000172BLK 24.3cm
Macete 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 magazzino

Coltello da tasca Extrema Ratio T911 04.1000.0164/SW 7.6cm
Coltello da tasca 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 magazzino

Coltello da tasca Extrema Ratio BD2 Lucky Desert 0410000228DW 9.6cm
Coltello da tasca 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 magazzino

Coltello da collo Extrema Ratio N.K.1 Desert Warfare 04.1000.0123/DW 5.1cm
Coltello Fisso 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 magazzino

Coltello da tasca Extrema Ratio BD2 R 04.1000.0227/SAT 9.6cm
Coltello da tasca 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 magazzino

Coltello da tasca Extrema Ratio BD1 R 0410000226SAT 7cm
Coltello da tasca Extrema Ratio BD1 R 7cm 0410000226SAT
L'Extrema Ratio BD1 R è uno dei coltelli chiudibili più compatti della linea base del marchio italiano. Questo coltello chiudibile presenta una lama da 70 mm con affilatura uniforme su tutto il filo e un controfilo che si estende per il 30% della lunghezza della lama. Come tipico di Extrema Ratio, la lama è realizzata in acciaio austriaco Böhler Steel N690 al cobalto. L'Extrema Ratio BD1 R pesa 75 g.
129,03 €

In magazzino

Coltello tattico Extrema Ratio Ermes Satin Ordinanza 0410000443SAT-OR 14cm
Coltello Fisso 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 €

Spedizione dopo 10-20 giorni lavorativi

Coltello tattico Extrema Ratio Ermes Black Operativo 0410000443BLK-OP 14cm
Coltello Fisso 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 €

Spedizione dopo 10-20 giorni lavorativi

Coltello da tasca Extrema Ratio BD2 Lucky Black 0410000228BLK 9.6cm
Coltello da tasca 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 magazzino

Coltello da tasca Extrema Ratio BD4 Lucky Desert 0410000497DW 12.3cm
Coltello da tasca 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 magazzino

Coltello da tasca Extrema Ratio BD4 Lucky Black 04.1000.0497/BLK 12.3cm
Coltello da tasca 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 magazzino

Coltello da tasca Extrema Ratio Panthera Nero 0410000135BLK 10cm
Coltello da tasca Extrema Ratio Panthera Nero 10cm 0410000135BLK
Extrema Ratio Panthera è un coltello chiudibile completamente nero. Questo modello presenta caratteristiche assolutamente identiche al modello T-Razor, da cui trae ispirazione. La differenza in questa silhouette è che la parte dorsale, come nelle lame del Wharncliffe, scende fino alla punta del coltello. L'Extrema Ratio Panthera è dotato di un sistema di apertura assistita ad alta velocità, denominato Razor, che ne facilita l'uso.
188,71 €

In magazzino

Coltello da tasca Extrema Ratio Panthera Satin 0410000135SAT 10cm
Coltello da tasca 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 magazzino

Coltello da tasca Extrema Ratio Resolza 10 Black 04.1000.0168/BLK 10cm
Coltello da tasca 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 magazzino

Coltello pieghevole karambit Extrema Ratio Nightmare Stonewashed 04.1000.0454/SW 7.3cm
Coltello da tasca 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 magazzino

Coltello da tasca Extrema Ratio Glauca B1 04.1000.0139/BLK 10.7cm
Coltello da tasca 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 €

Spedizione dopo 10-20 giorni lavorativi

Coltello da collo Extrema Ratio N.K.1 Black 04.1000.0123/BLK 5.1cm
Coltello Fisso 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.
128,23 €

In magazzino

I coltelli Extrema Ratio fanno parte dell’equipaggiamento di molte unità militari speciali in Italia, nonché della polizia e dei servizi di soccorso. Ogni modello viene sviluppato con grande attenzione e, prima di essere messo in produzione, supera una serie di test rigorosi. L’azienda collabora con l’Università di Perugia, dove gli scienziati conducono studi per valutare l’ergonomia dei prodotti Extrema Ratio e i metodi per migliorarla. Sia i coltelli tattici Extrema Ratio sia i coltelli per uso quotidiano si distinguono per una qualità impeccabile. La maggior parte dei coltelli è realizzata in acciaio austriaco N690. Extrema Ratio utilizza Böhler N690 per la sua affidabilità e prevedibilità. Questo acciaio è noto per l’elevato contenuto di molibdeno e cobalto e per l’alta resistenza alla corrosione. Grazie a queste caratteristiche, l’acciaio N690 offre elevata resistenza e sopporta bene gli urti, aspetto particolarmente importante per l’uso tattico.

Modelli popolari di coltelli Extrema Ratio

I coltelli Extrema Ratio più popolari sono Fulcrum, Col Moschin, RAO, Adra. Extrema Ratio produce inoltre diverse linee di coltelli pieghevoli tattici: BF (basic folder), MF (medium folder), e le serie BD4 e BD2. I modelli pieghevoli possono essere utilizzati anche in ambito urbano.

Domande frequenti sui coltelli Extrema Ratio

Cosa significa Extrema Ratio?

Extrema Ratio significa in latino «misure estreme». Il nome riflette la filosofia del marchio: coltelli progettati per situazioni in cui sono fondamentali la massima affidabilità, il controllo e la preparazione a condizioni estreme.

Dove vengono prodotti i coltelli Extrema Ratio?

I coltelli Extrema Ratio sono interamente prodotti in Italia. L’azienda ha sede a Prato e controlla l’intero processo, dallo sviluppo all’assemblaggio. Il marchio è fornitore ufficiale per le forze militari e le strutture di sicurezza ed è certificato come fornitore NATO.

Quale coltello Extrema Ratio viene utilizzato dai militari?

Uno dei modelli più noti è il Col Moschin, sviluppato per il 9º reggimento paracadutisti d’assalto delle forze speciali italiane. Vengono utilizzati anche modelli come Fulcrum, Requiem e altri coltelli progettati per compiti specifici.

Vale la pena acquistare coltelli Extrema Ratio?

Se hai bisogno di un coltello molto resistente e affidabile per attività tattiche, outdoor o uso intensivo — sì. Extrema Ratio è uno strumento con un elevato margine di resistenza, progettato per l’uso reale. I coltelli Extrema Ratio si distinguono anche per un’altissima qualità costruttiva. Nel corso degli anni di attività del nostro negozio, questo marchio ha il minor numero di reclami da parte dei clienti riguardo alla qualità dei prodotti.

Nel negozio online MyGoodKnife puoi acquistare coltelli Extrema Ratio originali — siamo rivenditori ufficiali del marchio e offriamo solo prodotti autentici con spedizione in tutto il mondo.