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 Fulcrum Compact Full handle DW 04.1000.0110/DW 11cm
Coltello Fisso Extrema Ratio Fulcrum Compact Full handle DW 11cm 0410000110DW
Extrema Ratio Fulcrum Compact FH DW has a downsized blade 110 mm (4.33 in) and Forprene handle make it comfortable to carry and easily concealed. The included hard sheath can be worn vertically, horizontally or obliquely (at a 45° angle), and sports a single automatic pressure-activated security lock for quick, easier drawing and sheating. This makes the FULCRUM C an intuitive, rapid-use knife, ideally suited to emergencies or self-defense. The original version of the FULCRUM C comes with a 4.1in compact handle, the Full Handle version comes with a more comfortable 5in handle. Weight 258 g (9.10 oz)
215,13 €

Spedizione dopo 10-20 giorni lavorativi

Tactical knife Extrema Ratio Fulcrum Compact Desert Warfare 04.1000.0150/DW 11cm
Coltello Fisso Extrema Ratio Fulcrum Compact Desert Warfare 11cm 04.1000.0150/DW
Fulcrum Compact Desert Warfare is the shorter version of the Fulcrum, which equals in robustness and sturdiness. Its downsized blade 110 mm (4.33 in) and Forprene handle 104 mm (4.1 in) with Desert warfare pattern make it comfortable to carry and easily concealed. The included hard sheath can be worn vertically, horizontally or obliquely (at a 45° angle), and sports a single automatic pressure-activated security lock for quick, easier drawing and sheating. This makes the FULCRUM C an intuitive, rapid-use knife, ideally suited to emergencies or self-defense. Weight 226 g (8 oz)
215,13 €

Spedizione dopo 10-20 giorni lavorativi

Tactical knife Extrema Ratio Corvo 04.1000.0442/BLK 17.6cm
Coltello Fisso Extrema Ratio Corvo 17.6cm 0410000442BLK
The Corvo is a traditional Chilean Army combat knife. Its origins are misterious: it did probably arrive in the New World with the Spanish Conquistadores, who had already appreciated it during the war against the Moors. Corvo has been used during the War of the Pacific. It was produced in several versions such as: the Curved Corvo with the blade bending at almost 90° and the Corvo Atacameño combat knife which is longer but with a gentler bending of the blade for a higher flexibility during use. Extrema Ratio has been inspired by this second version.The black blade 176 mm (6.92 in) is made of Böhler N690 steel. Forprene handle. Total length 307 mm (12.08in) Weight  362 g (12.76 oz)
285,20 €

Spedizione dopo 10-20 giorni lavorativi

Tactical knife Extrema Ratio Contact HCS 04.1000.0215/HCS 16.2cm
Coltello Fisso Extrema Ratio Contact HCS 16.2cm 0410000215HCS
Extrema Ratio Contact HCS version. It has a stonewash 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.
223,88 €

Spedizione dopo 10-20 giorni lavorativi

Tactical knife Extrema Ratio Col Moschin Black Collector Edition 04.1000.0125/BLK-CE 15cm
Coltello Fisso Extrema Ratio Col Moschin Black Collector Edition 15cm 0410000125BLKCE
Now available also in the Collector Edition version with special plexiglass diplay case. Commissioned and officially adopted in 2002 by the Ninth Rgt. Incursori "Col. Moschin", this model is the quintessence of a pure combat knife. Inspired by daggers with an asymmetric blade and straight but slightly orientated handle used by the Arditi, in whose footsteps the Col Moschin Regiment follows, it has been re-elaborated in a modern form, endowed with a double edged blade, (single for the civilian version), integral guards and a removable E.R.M.H. handle in Forprene. Both grindings are hollow grind razor sharp. The centre of gravity is towards the end of the handle, the point especially sharp, it is light, manageable and intuitive. Each new Incursore receives one, and each new Incursore is trained to use it in the best way.
570,39 €

Spedizione dopo 10-20 giorni lavorativi

Tactical knife Extrema Ratio 39-09 Special Edition 04.1000.0339/SAT-SE 19.5cm
Coltello Fisso Extrema Ratio 39-09 Special Edition 19.5cm 04.1000.0339/SAT-SE
This Extrema Ratio 39-09 Special Edition 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 – not to mention advocated for by knife collectors worldwide – this combat knife 39-09 is a restyling of the Model 1939 “paracadutista assaltatore” (assault paratrooper) knife, a celebrated piece of Italian military history. The included hard sheath is designed to be worn at the ankle, in the characteristic fashion of Italian paratroopers. The 39-09 SPECIAL EDITION version, numbered, unlimited edition, has wooden hilt, satin-finish blade. It comes in a black wooden case, including a parade belt sheath. 
643,00 €

Spedizione dopo 10-20 giorni lavorativi

Fat Boy Dark Stone
Coltello Fisso Extrema Ratio Fat Boy Dark Stone 21cm 0410000107OKS-BLK
New amazing Extrema Ratio Fat Boy Dark Stone knife. It has 21 cm length blade made of N690 steel with a thickness of 8.6 mm. Weight of Extrema Ratio Fat Boy is 1 kg. Thanks to its generous size, Fat Boy is ideal for all heavy tasks. The handle is composed of two black G10 scales. Fat Boy knife is equipped with a black Cordura sheath with MOLLE system. Available also in satin version.
589,62 €

Spedizione dopo 10-20 giorni lavorativi

Fixed blade Knife Extrema Ratio Fat Boy Satin 0410000107SAT-BLK 21cm
Coltello Fisso Extrema Ratio Fat Boy Satin 21cm 0410000107SAT-BLK
A long-awaited new product - a unique Extrema Ratio Fat Boy knife. This is the version with a satin finish blade. Fat Boy is the most robust fixed blade knife ever produced by Extrema Ratio.  It has 21 cm length blade. This is the first model produced in N690 steel (58HRC) with a thickness of 8.6 mm, for a total weight of 1 kg. Thanks to its generous size, Fat Boy is ideal for all heavy jobs, from splitting to disengagement in extreme scenarios, allowing you to carry out different activities, including levering to open doors, car doors and windows. The handle is composed of two black G10 scales, featuring a new original Extrema Ratio design. They can be removed and replaced. Fat Boy knife is equipped with a black Cordura sheath with an anti-cutting rubber blade lock. The MOLLE system on both sides can be used by both right-handed and left-handed.
589,62 €

In magazzino

Neck knife Extrema Ratio Kiri Dark Stone 04.1000.0187/BLK-SW 6cm
Coltello Fisso Extrema Ratio Kiri Dark Stone 6cm 0410000187BLKSW
Coltello da collo Extrema Ratio Kiri Dark Stone 04.1000.0187/BLK-SW con lama da 6 cm. Il Kiridashi è un tipo di coltello giapponese, uno strumento da taglio multiuso. Una delle sue caratteristiche è la sua bisellatura asimmetrica, dove solo uno dei due lati è affilato e l'altro è lasciato piatto. Questo coltello tradizionale giapponese è stato ricreato da Extrema Ratio nel rispetto del suo stile, conferendogli un aspetto più tattico rispetto all'originale. Per l'Extrema Ratio KIRI sono disponibili sia la finitura Dark Stone che quella Satin, realizzate in acciaio Böhler N690 temprato a 58 HRC. Due guancette in metallo anticorodal anodizzato nero compongono l'impugnatura. Gli occhielli metallici sul fodero preformato in Kydex consentono di agganciarlo a una fettuccia con sistema M.O.L.L.E. e di inserire un paracord.
215,94 €

In magazzino

Neck knife Extrema Ratio Kiri Satin 04.1000.0187/SAT 6cm
Coltello Fisso Extrema Ratio Kiri Satin 6cm 04.1000.0187/SAT
Neck knife Extrema Ratio Kiri Satin with 6cm blade. Kiridashi is a type of Japanese knife, a cutting multipurpose tool. Its asymmetric bevel, where only one of the two sides is ground and the other is left flat, is one of its features. This traditional Japanese knife has been recreated by Extrema Ratio in accordance with its style, giving it a more tactical appearance than the original. Both the Dark Stone and Satin finishes, made of Böhler N690 steel hardened to 58 HRC, are offered for the Extrema Ratio KIRI.
Two black anodized anticorodal metal scales make up the handle. The metal eyelets on the pre-shaped Kydex sheath allow you to attach it to an M.O.L.L.E. system webbing and insert a paracord.
205,56 €

In magazzino

Tactical knife Extrema Ratio Contact C Desert
Coltello Fisso Extrema Ratio Contact C Desert 12.8cm 0410000216DW
Extrema Ratio Contact C Desert has a Böhler N690 steel spearpoint blade, hardened at 58 HRC. The injection molded, impact grade nylon, M.O.L.L.E. compatible scabbard. Extrema Ratio Contact C Desert weights 273 g. 
185,48 €

Spedizione dopo 10-20 giorni lavorativi

Coltello tattico Extrema Ratio Pugio Black 0410000314BLK 11cm
Coltello Fisso Extrema Ratio Pugio Black 11cm 0410000314BLK
Though named after a short and pointed Roman dagger, our own Extrema Ratio Pugio Black  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).
251,79 €

In magazzino

Fixed blade Knife Extrema Ratio T4000 C Black
Coltello Fisso Extrema Ratio T4000 C Black 10.4cm 0410000434BLK
T4000 C from the Extrema Ratio tanto collection is a product designed for intensive use. The handle is made of forprene.The tanto blade is made of Böhler 690 steel with a MIL-C-13924. Weight: 196 gr.
203,19 €

In magazzino

Rescue knife Extrema Ratio Ferrum Rescue Red 04.1000.0365
Coltello da salvataggio Extrema Ratio Ferrum Rescue Red 5.6cm 0410000365SWRED
Ferrum Rescue Red is a product designed for intensive use, developed in collaboration with Andrea Micheli. The handle is made of anodized anti-corrosion aluminum. The first serrated blade allows it to cut through larger ropes or fabrics, while the smooth edge acts like a real knife. The second blade is a scalpel that can be used to make very precise cuts and perform emergency procedures. The third and smallest one, located on the back of the main blade, is a cord cutter that can also be used to cut aramid paracord. Locking mechanism - LinerLock. The model has a reversible clip.
233,87 €

In magazzino

Tactical knife Extrema Ratio Contact C Wolf Grey
Coltello Fisso Extrema Ratio Contact C Wolf Grey 12.8cm 0410000216WG
Compact version of the CONTACT, the Contact C Wolf Grey from Extrema Ratio has a Böhler N690 stainless steel spearpoint blade, hardened at 58 HRC with single branch handguard and full length fuller for lightness. 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 and a retention safety disengaged by simple pressure on the trigger-like lever.
183,27 €

Spedizione dopo 10-20 giorni lavorativi

Tactical knife Extrema Ratio Fulcrum Desert Warfare
Coltello Fisso Extrema Ratio Fulcrum Desert Warfare 18cm 0410000082DW
The Extrema Ratio Fulcrum’s Desert Warfare blade can sustain loads of over 150 kilograms without breaking. Blade length is 180 mm. 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. 
305,95 €

In magazzino

Tactical knife Extrema Ratio DMP Desert
Coltello Fisso Extrema Ratio DMP Desert 15.2cm 0410000219DW
Extrema Ratio DMP Desert is a multipurpose fixed blade knife. The drop point blade has length 152 mm. Blade is made of Bohler N690 steel. The sheath has a reversible system for ambidextrous users. Extrema Ratio DMP has handy forprene handle. 
217,51 €

In magazzino

Folding knife Extrema Ratio RAO II Expeditions
Coltello da tasca Extrema Ratio RAO II Expeditions 11.9cm 0410000136EXP
RAO II Expeditions is a heavy and useful tool. It has a desert-coloured aluminum handle and sheath. Blade is made of Bohler N690 (58HRC) steel with a special finishing. Rao II Expeditions has ergonomic handle scales with rounded upper angles, and a drop point blade. The new Expedition Series folding knife can be easily used for heavy duties also thanks to its extremely sturdy locking mechanism, which is supported by a safety that turns it into a proper fixed blade. There is a threaded steel pin to be hand-screwed through two holes by the guard section of the massive aluminum handle.
342,74 €

In magazzino

Tactical knife Extrema Ratio Contact C HCS
Coltello Fisso Extrema Ratio Contact C HCS 12.8cm 0410000216HCS
Knife Extrema Ratio Contact C HCS comes with forprene handle. Knife has a Böhler N690 steel spearpoint blade, hardened at 58 HRC with single branch handguard and full length fuller for lightness. 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 and a retention safety disengaged by simple pressure on the trigger-like lever.
185,48 €

Spedizione dopo 10-20 giorni lavorativi

Tactical knife Extrema Ratio A.M.F. Deser
Coltello Fisso Extrema Ratio A.M.F. Desert 20.6cm 04.1000.0485/DW
A.M.F. (Advanced Multi Function) is a 20,6 cm blade knife inspired to a legend in the survival cutlery of the 80es. It can be easily disassembled. It comes with cordura sheath fitting the M.O.L.L.E. system. A survival kit (to be bought only on request) can be easily fixed to the cordura sheath. A.M.F. comes in black and in desert version
327,42 €

Spedizione dopo 10-20 giorni lavorativi

Tactical knife Extrema Ratio Contact Wolf Grey
Coltello Fisso Extrema Ratio Contact Grigio 16.2cm 0410000215WG
L'elegante e affidabile coltello Extrema Ratio Contact Wolf Grey è il primo modello della nuova linea di coltelli tattici full-size Extrema Ratio. Il coltello è dotato di una lama con profilo Spear Point da 16,2 centimetri in acciaio BöHLER N690 con un grado di tempra fino a 58 unità sulla scala di durezza Rockwell. Il coltello ha caratteristiche prestazionali universali e resistenza a carichi estremi. L'impugnatura del coltello tattico Contact è realizzata in materiale termoplastico Forprene. Peso 300 g. Extrema Ratio Contact è dotato di fodero in nylon antiusura compatibile con sistemi M.O.L.L.E.
226,61 €

In magazzino

Hunting and Outdoor knife Extrema Ratio Dobermann IV Classic 04.1000.0184/SAT 18.5cm - 1
Coltello Fisso Extrema Ratio Dobermann IV Classic 18.5cm 04.1000.0184/SAT
DOBERMANN IV evolved from the first and most classic Extrema Ratio knife, the K1 DOBERMANN. Over the years, the DOBERMANN has undergone significant change in look and design to meet evolving consumer expectations and ever-changing trends, while at its core retaining consistency with the original 1997 design. This last iteration, too, excels at structural durability and flexibility of use: perhaps our most versatile knife, the DOBERMANN IV is suitable for hunting, outdoors survival, camping, defense, up to and encompassing military use. There are only best fixed blade knives in MyGoodKnife's range.
368,55 €

Spedizione dopo 10-20 giorni lavorativi

Folding knife Extrema Ratio RAO II
Coltello da tasca Extrema Ratio RAO II 11.9cm 04.1000.0136/BLK
The Extrema Ratio RAO II is a new version of the famous Extrema Ratio RAO knife; it comes with a new drop-point blade and an improved handle that is rounded at the top corners for a more ergonomic grip. The extra safety lock transforms the RAO II into a fixed blade knife for high performance without risk of injury. The sheath can hold the knife open for frequent use or closed in the front pocket. It comes with a diamond sharpener to always have a perfect cutting edge.
334,68 €

Spedizione dopo 10-20 giorni lavorativi

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.