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 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

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

Survival knife Extrema Ratio Ontos Green No Kit 04.1000.0127/GRN-NK 15.9cm - 1
-6%
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-tool Extrema Ratio TK Tool 2.0 Stonewashed tksw 10cm - 1
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

Tactical knife Extrema Ratio Operativo 39-09 Operativo
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

Training knife Extrema Ratio TK Suppressor 04.1000.0312-TK 17.6cm - 1
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

Folding knife Extrema Ratio BF0 R CD Desert 04.1000.0461/DW 5.5cm - 1
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

Folding knife Extrema Ratio BF0 R CD Ranger Green 04.1000.0461/GRN 5.5cm - 1
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

Folding knife Extrema Ratio BF0 R CD HCS 04.1000.0461/HSC 5.5cm - 1
Coltello da tasca Extrema Ratio BF0 R CD HCS 5.5cm 0410000461HSC
Il coltello pieghevole Extrema Ratio BF0 R CD HCS presenta un manico color sabbia. La lama da 55 mm ha un classico profilo drop-point. Un affidabile sistema di bloccaggio liner-lock garantisce la massima sicurezza della lama sia in posizione aperta che chiusa. La lama del coltello pieghevole Extrema Ratio BF0 R CD è realizzata in acciaio Bohler N690. Pesa 53 g.
65,32 €

In magazzino

Folding knife Extrema Ratio BF0 R CD Black 04.1000.0461/SW 5.5cm - 1
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

Sharpening stone Extrema Ratio Double grain 0441000102 - 1
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

Hunting and Outdoor knife Extrema Ratio Dobermann IV S Africa erd4af 14.3cm - 1
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

Folding knife Extrema Ratio BF1 CD Black Ruvido 04.1000.0143/RVB 6.9cm - 1
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

Folding knife Extrema Ratio BF3 Dark Talon
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

Tactical knife Extrema Ratio Fulcrum Black 04.1000.0082/BLK 17.1cm - 1
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

Diving knife Extrema Ratio BF2 V 04.1000.0147/SW 6.5cm - 1
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

Coltello tattico Extrema Ratio Misericordia 04.1000.0479/BLK/CIV 11.8cm
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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.
166,53 €

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Extrema Ratio Versa Satin 0410000214SAT 8cm
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Extrema Ratio Versa Satin 8cm 0410000214SAT
Versa è un nuovo coltello multiuso di Extrema Ratio. Questo modello ha una costruzione monolitica in acciaio Bohler N690. La lama da 80 mm ha un profilo tanto. Il nome Versa incarna perfettamente le caratteristiche di questo coltello; la sua versatilità lo rende adatto a una varietà di situazioni. Extrema Ratio Versa è ottimo come coltello da trasporto quotidiano, ma anche come coltello da outdoor, survival, bushcraft o da caccia. La versione satinata è comoda come coltello EDC. Il peso è di 110 g. Versa è dotato di fodero in kydex.
135,46 €

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Coltello da tasca Extrema Ratio Ant SP Ranger Stone Washed Verde 041000469SWGRN 5.1cm
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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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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.