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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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 da tasca Extrema Ratio MF2 Black Ruvido 04.1000.0142/RVB 11.3cm
Coltello da tasca 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 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

Coltello Sopravvivenza Extrema Ratio Ontos Black No Kit 0410000127BLKNK 16.8cm
Coltello Sopravvivenza Extrema Ratio Ontos Black No Kit 16.8cm 0410000127BLKNK
L'Extrema Ratio Ontos è un coltello resistente per le attività outdoor più impegnative. Questa versione non include un kit di sopravvivenza. Il nome ONTOS deriva dal greco e significa "fenomeno". Parte della superficie superiore della lama è seghettata. La lama da 168 mm è realizzata in acciaio Bohler N690 di alta qualità con uno speciale rivestimento nero MIL-C-13924. Il resistente manico in elastomero Forprene nero è dotato di un foro per cordino. È incluso un fodero con sistema M.O.L.L.E. Il coltello pesa circa 411 g.
319,35 €

In magazzino

T-shirt Extrema Ratio Apron black
T-shirt Extrema Ratio Apron black
Black cotton apron with embroidery and multiuse front double pocket. 65% polyester, 35% cotton.
54,98 €

In magazzino

Coltello da tasca Extrema Ratio BF2 CD Black Ruvido 04.1000.0145/RBV 8.7cm
Coltello da tasca Extrema Ratio BF2 CD Black Ruvido 8.7cm 04.1000.0145/RBV
Extrema Ratio BF2 CD Black Ruvido version. BF2's are “Full size” folding knives especially suitable for professional use by military or police operatives on the field. The handle is solid and comfortable, with the reversible clip becoming a useful and comfortable resting point for the thumb in a “reverse” grip. Characteristical lowered flat areas in the handle give access to the opening “pins”, which don’t protrude from the knife when closed. The flat-ground blade is available in a drop-point or a tanto shape, featuring an extra-thick and stout tip (as in model BF1). The renowned LINER-LOCK blade-blocking system is paired with a carter-protected, manually-activated secondary blocking system.
181,45 €

Spedizione dopo 10-20 giorni lavorativi

Coltello tattico Extrema Ratio Giant Mamba Black 04.1000.0218/BLK 16.3cm
Coltello Fisso Extrema Ratio Giant Mamba Black 16.3cm 04.1000.0218/BLK
The Giant Mamba has a 6.3 mm thick, 58 HRC Böhler N690 steel, plain edged tanto blade with full length fuller for lightness finished in black or stone washed. The Forprene grip is affixed by a threaded tang that makes the knife sturdy and well balanced. The injection molded, impact grade nylon, M.O.L.L.E. compatible scabbard has a dampening system to avoid blade rattle, twin button safety loop, anti-rotation rubberized thigh strap and a retention safety disengaged by simple pressure on the trigger-like lever. The new knife line minimizes thickness and bulk without skimping on toughness and safety.
250,81 €

Spedizione dopo 10-20 giorni lavorativi

Coltello tattico Extrema Ratio Contact Desert 04.1000.0215/DW 16.2cm
Coltello Fisso Extrema Ratio Contact Desert 16.2cm 04.1000.0215/DW
Extrema Ratio Contact Desert version. 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. 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.
226,61 €

Spedizione dopo 10-20 giorni lavorativi

Tactical knife Extrema Ratio Contact Black
Coltello Fisso 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.
250,81 €

Spedizione dopo 10-20 giorni lavorativi

Coltello da allenamento Extrema Ratio TK BF2 04.1000.0145-TK 8.9cm
Coltello da allenamento 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.
32,26 €

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.