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 Sopravvivenza 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.
300,19 €
319,35 €

In magazzino

Multi-strumento Extrema Ratio TK Tool 2.0 Stonewashed 10cm 04.1000.0050/SW
Extrema Ratio multifunctional tool with a basic and essential design, jointly developed with military professionals. It features a special tip useful for adjusting and calibrating firearm optics. The front of a TK TOOL 2.0 can be used as a screwdriver suitable for 8/10 mm screws, or as a prying lever. The central slot in the blade can be used as a shackle key. This tool has also features two holes for a cord or paracord used in assembling a field or camping tent. Overall, a much sought-after tool for a number of outdoor activities. MOLLE system compliant.
63,71 €

Spedizione dopo 10-20 giorni lavorativi

Coltello da allenamento 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.
48,39 €

In magazzino

Coltello Fisso Extrema Ratio 39-09 Operativo 19.5cm 04.1000.0339/BLK-OP
Extrema Ration 39-09 Operativo 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. This combat knife 39-09 is a restyling of the Model 1939 “paracadutista assaltatore” (assault paratrooper) knife, a celebrated piece of Italian military history.
Small changes which make it a highly effective, dependable dagger. The included hard sheath is designed to be worn at the ankle, in the characteristic fashion of Italian paratroopers.
The 39-09 Operativo version has Forprene handle, black blade oxide-coated, no logo. It comes in a black belt sheath. Weight  338 g (11.9 oz)
350,00 €

In magazzino

Coltello da allenamento Extrema Ratio TK Suppressor 17.6cm 04.1000.0312-TK
Suppressor training knife. 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.
51,61 €

In magazzino

Coltello da tasca Extrema Ratio BF0 R CD Desert 5.5cm 04.1000.0461/DW
BF0 R CD folding knife with Desert handle. Extrema Ratio is proud to present the new basic folder BF0 R CD. It is a small Basic folders. Its handle produced in technopolymer makes it light and resistant, also thanks to its steel internal frame. BF0 R CD employs the trustworthy LINER-LOCK blade blocking system. It keeps all BF0 characteristics improved with new High Speed Razor Opening System. Available versions: Black, Desert, HCS, Ranger Green, Wolf Grey
65,32 €

In magazzino

Coltello da tasca Extrema Ratio BF0 R CD Ranger Green 5.5cm 04.1000.0461/GRN
BF0 R CD folding knife with Tanger Green handle. HCS Extrema Ratio is proud to present the new basic folder BF0 R CD. It is a small Basic folders. Its handle produced in technopolymer makes it light and resistant, also thanks to its steel internal frame. BF0 R CD employs the trustworthy LINER-LOCK blade blocking system. It keeps all BF0 characteristics improved with new High Speed Razor Opening System. Available versions: Black, Desert, HCS, Ranger Green, Wolf Grey
67,73 €

In magazzino

Coltello da tasca Extrema Ratio BF0 R CD HCS 5.5cm 04.1000.0461/HSC
BF0 R CD folding knife with HCS handle. HCS Extrema Ratio is proud to present the new basic folder BF0 R CD. It is a small Basic folders. Its handle produced in technopolymer makes it light and resistant, also thanks to its steel internal frame. BF0 R CD employs the trustworthy LINER-LOCK blade blocking system. It keeps all BF0 characteristics improved with new High Speed Razor Opening System. Available versions: Black, Desert, HCS, Ranger Green, Wolf Grey
65,32 €

In magazzino

Coltello da tasca Extrema Ratio BF0 R CD Black 5.5cm 04.1000.0461/SW
Extrema Ratio is proud to present the new basic folder BF0 R CD. It is a small Basic folders. Its handle produced in technopolymer makes it light and resistant, also thanks to its steel internal frame. BF0 R CD employs the trustworthy LINER-LOCK blade blocking system. It keeps all BF0 characteristics improved with new High Speed Razor Opening System. Available versions: Black, Desert, HCS, Ranger Green, Wolf Grey
65,32 €

In magazzino

Pietra per affilare Extrema Ratio Double grain
Extrema Ratio Double grain sharpener in silicon carbide. It is composed of a rough grain side (180) and a fine grain side (400) to carry out a more performing sharpening. Extrema Ratio Double grain sharpener comes with a cordura sheath
38,70 €

In magazzino

Coltello Fisso Extrema Ratio Dobermann IV Africa 18.5cm 04.1000.0184/AFR
Dobermann IV S Africa, a knife dedicated to hunters, projected to skin and work on the prey. It comes with a 185 mm satin blade. Dobermann IV S Africa will come with two different handles: one in santos rosewood and one in forprene. In this way the user can easily change the handle, depending on his needs. Moreover it will come with an Italian handmade leather sheath, a sharpener and a stainless steel marlin spike. There are only best hunting knives in MyGoodKnife's range.
540,32 €

Spedizione dopo 10-20 giorni lavorativi

Coltello da tasca Extrema Ratio BF1 CD Black Ruvido 6.9cm 04.1000.0143/RVB
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.
153,23 €

In magazzino

Coltello da tasca Extrema Ratio BF3 Dark Talon 12cm 04.1000.0158/BLK
The common features of the "Basic Folder" series, including the BF1 and BF2, are lightness, simplicity and ease of carry. BF1 e BF2 are utility knives, the BF3 is both a utility and a combat knife. The blade is sharp and piercing, the carry (where legally allowed) is sufficiently comfortable. The “bridge like” clip and a long enough pocket will properly conceal the knife. Slim and essential.
183,87 €

In magazzino

Coltello Fisso Extrema Ratio Fulcrum FH Black 17.1cm 04.1000.0082/BLK
Probably a milestone among multipurpose knives. Employed on a large scale in Afghanistan as standard equipment by the members of the Italian mission "Nibbio", it is part of an experimental project undertaken by the Alpine Troops Headquarters on the renewal of individual equipment. During the preparation for this mission, the Alpine Troops Headquarters coordinated a team of companies in the realization of a new and complete experimental kit of individual equipment. Extrema Ratio is the company that the Alpine Troops Headquarters chose for the development of a multipurpose knife suitable for the infantry, a knife that could be used in any action and that could successfully solve any type of problem even where more specialized equipment proved inadequate.It was so successful that the multipurpose knife then led to the development of the Fulcrum Bayonet, which had the same characteristics but could be fixed to the issued rifle. The Fulcrum is an extremely robust and versatile knife, the blade can take loads over 150kg without breaking, the point is incredibly robust and the "tanto" profile means the knife can be used for long periods without affecting the sharpness of the last section, this guarantees, together with the partially sharp dorsal blade, (the civilian version does not include this), its capacity for penetration which is necessary in close combat against targets with heavy clothing, garnments and soft ballistic protection. The forward centre of gravity and the weight of the blade make it suitable for heavy field work. The new automatic hard sheath means it can be carried both safely and comfortably and the lace that holds the upper part of the handle dramatically reduces the risk of entanglement, even when making parachute jumps. The speed and facility with which both ordinary and extraordinary maintenance can be carried out help to make Fulcrum an excellent choice for use on a large scale from an economic and administrative point of view.
295,16 €

Spedizione dopo 10-20 giorni lavorativi

Coltello Fisso Extrema Ratio Col Moschin Desert Warfare 15cm 04.1000.0125/DW
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.
341,94 €

In magazzino

Coltello da sub Extrema Ratio BF2 V 6.5cm 04.1000.0147/SW
Boatswain's knife. Thanks to extremely compact shape typical of BF Extrema Ratio models, the extraction of the knife from the pocket becomes easier and it prevents the tool from entangling, a crucial detail in case of emergency. The blade has a flat grinding which allows symmetrical cutting jobs symmetrical with wider support. On the other hand the tip which is thick and durable thanks to the “tanto” version, allows a greater penetration and a more clean and precise cut.The aluminum handle, has the typical "Tactical" structure, already used in the past on the BF models.It has got a pattern of concentric circles giving the handle an additional grip. This structure enables the rinsing of the handle from salt, or organic material, very important considering its primary use in the naval environment. In the central part of the handle its placed a small slot to allow to lock or unlock small wrenches. In the right part of the handle, in correspondence of the liner lock, a steel plate is placed to give a more solid structure to the slot. The BF2 V comes with just one stone washed finishing to find it easier. The same finishing is proposed for the accessories: •reversible clip applicable on both right or left side of handle. •screw regulation system with 12 positions to control the closing and opening of the blade. •marlin sparkle on the tang of the handle with a length of 70mm to untie knots in ropes or thick cords. In opened position it is fixed by a steel mechanism easy to activate and placed inside the handle in order to feel it while handling the knife. It comes with a plastic lanyard with a fix to be fix to the belt, with a joint to allow the different placements and with a quick release simply pushing of the clip button. The length and flexibility of the lanyard allows to work with the tool in the maximum operating area what a shorter lanyard would not allow
209,68 €

In magazzino

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Coltello Fisso Extrema Ratio Misericordia 11.8cm 04.1000.0479/BLK/CIV
L'Extrema Ratio Misericordia è un coltello tattico a lama fissa estremamente leggero e compatto. Può essere utilizzato sia come coltello principale che come coltello di riserva. All'estremità dell'impugnatura è presente un ampio anello che consente l'uso di tecniche di arti marziali e garantisce una presa sicura. È dotato di un frantumatore di teschio in metallo duro che può essere utilizzato anche come rompi-vetro. Poiché il coltello è progettato per uso professionale, grande importanza è data alla facilità di trasporto, accesso e recupero. Il coltello è fissato al fodero con una protezione a sgancio rapido che può essere facilmente ruotata per l'uso con la mano sinistra. Il fodero in nylon resistente agli urti è versatile: il sistema a doppia clip regolabile consente all'utente di montarlo su diversi tipi di cinture.
163,35 €

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Coltello da tasca Extrema Ratio Ant SP Ranger Stone Washed Verde 5.1cm 041000469SWGRN
L'Extrema Ratio ANT SP è progettato per operare in qualsiasi condizione senza essere individuato. La lama a punta di lancia, lunga appena 5 cm, è realizzata in acciaio Bohler N690 con finitura stonewashed. Il resistente manico tattico verde è realizzato in alluminio anodizzato. Con un peso di soli 44 grammi, il coltello Extrema Ratio ANT SP è dotato di clip da tasca e foro per cordino, che lo rendono facile da trasportare: in tasca, nello zaino o sulla tua attrezzatura.
99,60 €

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Coltello Fisso Extrema Ratio Requiem EVO Dark 11.6cm 0410000475MGCBLKBLK
Il REQUIEM EVO DARK è un coltello in edizione limitata di soli 250 pezzi. Il suo design a codolo intero aggiunge resistenza ed equilibrio. Le guancette in G10 nero con un futuristico design CNC ne enfatizzano il carattere moderno. La lama è realizzata in acciaio Magnacut, che combina resistenza alla corrosione, elevata durezza, affilatura e resistenza allo stress. Compatto e aggressivo nello spirito, il REQUIEM EVO DARK è a suo agio sia nell'equipaggiamento che nell'uso quotidiano. Il kit include due foderi per diversi scenari: l'Aspis, per il porto occulto quotidiano, l'estrazione rapida e l'uso confortevole in ambiente urbano; e il Kydex, un sistema tattico modulare compatibile con MOLLE, Ulticlip, Belt Clip, paracord e altre configurazioni. Peso: 135 g. Il coltello viene fornito in una confezione premium con una targhetta metallica numerata che ne conferma l'esclusività.
351,39 €

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Coltello Fisso 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.
338,65 €

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Coltello da tasca Extrema Ratio BD4 Contractor Black 12.3cm 04.1000.0498/BLK
Extrema Ratio BD4 Contractor is a black double-edged semi-serrated folding knife with a guard. The guard also acts as a flipper, and the high-speed auxiliary knife opening system makes it easy to use. The ergonomic handle uses anodized aluminum alloy and the stonewashed streamlined blade is made from Böhler N690 cobalt steel. The BD4 Contractor perfectly combines the elegance of classic Italian style with the functionality of an EDC folding knife.
196,02 €

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Coltello da tasca Extrema Ratio MH Stealth 8.6cm 0410000483BLKTM
Creato in collaborazione con il Kommando Spezialkräfte (KSK) e la Gemeinschaft Deutscher Kommandosoldaten, l'MH-STEALTH è un coltello tattico pieghevole dal design innovativo. La lama è realizzata in acciaio Böhler N690 (58 HRC) con finitura lucida e emblema KSK inciso. La base è seghettata, il che ne migliora l'efficienza nel taglio rapido e preciso di materiali ad alta resistenza come corde o tessuti rinforzati.
273,31 €

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Coltello da tasca Extrema Ratio Glauca G1 Rescue 11.2cm 0410000179SWRED
Extrema Ratio GLAUCA G1 RESCUE is specially designed for rescue operations and is intended for a quick and precise response in the most difficult situations. The anodized, anti-corrosion aluminum handle in a bright red color makes the knife visible in all conditions, which is important when there is a need for quick and decisive intervention in emergency situations. The clip, adjustable in two positions, further increases practicality. The blade has a Stone Wash finish and is made of Böhler N690 steel. At the base of the blade there is a saw-tooth section, which makes it especially effective for quick and precise cuts in difficult materials such as ropes and reinforced fabrics, which is ideal for rescue operations.
Another feature of the GLAUCA G1 RESCUE is its folding rescue tool, designed to allow you to quickly make an emergency cut. In addition, it includes a stainless awl (locked in the open position) and a rear glass breaker. The knife is equipped with a LINER-LOCK lock, to which a second, manually operated safety mechanism is added. Every detail of GLAUCA G1 RESCUE is designed to tackle the most difficult challenges decisively and effectively.
378,49 €

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Coltello da tasca Extrema Ratio MF1 Evo SP Black M390 9.5cm
Extrema Ratio MF1 EVO SP is equipped with a Spear Point blade made of Böhler M390 steel. The handle is made of anodized aluminum, resistant to all weather conditions and rust. The blade locking mechanism Liner lock is additionally supported by the new generation safety system "HIDDEN LOCK". The weight of Extrema ratio MF1 Evo SP Black M390 is 185 g.
261,35 €

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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.