Extrema Ratio Knives

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Folding knife Extrema Ratio BD4 Contractor Black 04.1000.0498/BLK 12.3cm
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Folding knife 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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Folding knife Extrema Ratio MH Stealth 0410000483BLKTM 8.6cm
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Folding knife Extrema Ratio MH Stealth 8.6cm 0410000483BLKTM
Created in partnership with the Kommando Spezialkräfte (KSK) and the Gemeinschaft Deutscher Kommandosoldaten, the MH-STEALTH is a tactical folding knife featuring an inventive design. Böhler N690 steel (58 HRC) with a polished finish and the KSK emblem engraved on it makes up the blade. Its base is serrated, which improves its efficiency while cutting through high-strength materials like ropes or reinforced textiles quickly and precisely.
€273.31

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Tactical knife Extrema Ratio Vipera total black M390 0410000484M3BLKBLK 11.6cm
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Fixed blade Knife Extrema Ratio Vipera total black M390 11.6cm 0410000484M3BLKBLK
Requiem's tactical advantage and Mamba's emphasis on survival were combined to create VIPERA, which weighs less than 100g (3.5 oz) and offers speed, toughness, and precision. Its long drop-point blade, which has a full-flat, narrow-edge grind for razor-like cuts, pierces easily. Heat-treated to 61 HRC, it strikes a balance between durability and sharpness. Two high-performance steels with superior corrosion resistance and edge retention are available. Even under harsh circumstances, the handle's incorporated bottom guard ensures a firm grip. Vipera is lightweight, discrete, and designed for agility and control. The nylon ASPIS sheath is perfect for EDC in tactical, urban, survival, off-road, and outdoor settings; it mounts readily to belts, packs, and M.O.L.L.E systems. Vipera, designed for real-world missions, combines a small size with unwavering performance.
€179.28

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Folding knife Extrema Ratio Glauca G1 Resque 04.1000.0179SWRED 11.2cm
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Folding knife 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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Folding knife Extrema Ratio MF1 Evo D Black Satin M390 0410000232M3SATB 9.5cm
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Folding knife Extrema Ratio MF1 Evo D Black Satin M390 9.5cm 0410000232M3SATB
This version of the Extrema ratio MF1 Evo D folding knife has a satin blade made of Bohler M390 steel and a black handle. The handle consists of two anodized aluminum plates. Double-sided steel clip. The LINER-LOCK blade locking mechanism is supported by the new generation "HIDDEN LOCK" safety system. Extrema Ratio MF1 Evo D Black weighs 185 g.
€247.01

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Folding knife Extrema Ratio MF1 Evo D Red Satin M390 0410000232M3SATR 9.5cm
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Folding knife Extrema Ratio MF1 Evo D Red Satin M390 9.5cm 0410000232M3SATR
MF1 Evo is the evolution of Extrema Ratio MF1 knives series. This version of folding knife has a satin blade made ob Bohler M390 steel and red handle. Extrema Ratio MF1 Evo D Red weights 185 g.  The handle is composed of two finely machined anodized aluminum scales. The reversible steel clip allows to conceal the knife inside the pocket, making the knife invisible from the outside. The grip is equipped with a hard metal rear glass-breaker. The blade locking mechanism of the Extrema Ratio MF1 Evo D Re is the LINER-LOCK, supported by a new generation safety system “HIDDEN LOCK”.
€247.01

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Folding knife Extrema Ratio LKU01 Luce 04.1000.0243M3SATC 10cm
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Folding knife Extrema Ratio LKU01 Luce 10cm 04.1000.0243M3SATC
Extrema Ratio LKU01 Luce is a new, limited-edition version (only 100 pieces) of the popular LKU01 EDC knife. The blade features a satin finish and is made of Böhler M390 steel. The handle scales are crafted from carbon fiber, a material known for its high mechanical strength and vibration-absorbing properties, making the grip more comfortable to use. The Extrema Ratio LKU01 Luce weighs 109 g. Its stainless steel pocket clip is removable and ambidextrous. The clip is shaped like a horseshoe, paying tribute to Italian fighters of the 1800s and 1900s who used this symbol. The LKU01 Luce comes in an elegant black box that includes a carbon fiber card signed by master bladesmith Danilo Rossi Lajolo di Cossano. The card has rounded corners, but its lower edge is sharpened, allowing it to be used for defensive purposes if necessary. You are advised to check your local laws to ensure that the use, carrying, and transportation of this tool are permitted in your country.
€310.76

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Folding knife Extrema Ratio LKU01 Urban Sideral 10cm
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Folding knife Extrema Ratio LKU01 Urban Sideral 10cm
Extrema Ratio LKU01 URBAN Sideral is a new Italian EDC folding knife suitable also for tactical tasks. Knife has the 10 cm blade made of Böhler N690 steel blade. Handle scales are made of anticorodal aluminium. The pocket clip, made of stainless steel, is removable and reversible to ensure ambidextrous use. Extrema Ratio LKU01 URBAN Sideral weights 123 g. 
€182.47

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Extrema Ratio Versa Satin 0410000214SAT 8cm
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Extrema Ratio Versa Satin 8cm 0410000214SAT
Versa is a new multipurpose knife from Extrema Ratio. This models has a monolithic construction made of Bohler N690 steel. 80 mm blade has a tanto profile. Name Versa, perfectly embodies the characteristics of this knife; its versatility makes it suitable for a variety of situations. Extrema Ratio Versa good as Every Day Carry knife, and as outdoor, survival, bushcraft or hunting knife. Satin version is convinient as EDC knife. Weight is 110 g. Versa comes with kydex sheath.
€135.46

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Tactical knife Extrema Ratio Defender 2 DG Black 0410000489BLK 11.8cm
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Fixed blade Knife Extrema Ratio Defender 2 DG Black 11.8cm 0410000489BLK
Extrema Ratio Black Defender 2 DG is the combat version of Scout knife with ultra slim shape. This 118 mm blade comes with a blood drain which makes it lighter. This is DG - double guard version. Defender comes with black kydex sheath fitting the M.O.L.L.E. system.
€208.76

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Fixed blade Knife Extrema Ratio S-THIL Black Warfare 0410000223BWSE 11.9cm
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Fixed blade Knife Extrema Ratio S-THIL Black Warfare 11.9cm 0410000223BWSE
Extrema Ratio S-THIL Black Warfare is a special version of the S-THIL model. Knife is made from a single piece of 5 mm thick BOHLER N690 steel, developed in collaboration with the designer Thilo Arnd Schiller. The spear point type blade. The special Black Warfare version of Extrema Ratio S-THIL uses the innovative and original Geotech Camo pattern, created by laser engraving.
€262.15

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Tactical knife Extrema Ratio Defender 2 DG Stone washed 0410000489SW 11.8cm
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Fixed blade Knife Extrema Ratio Defender 2 DG Stone washed 11.8cm 0410000489SW
Extrema Ratio Defender 2 DG is the combat version of Scout knife with ultra slim shape. This 118 mm blade comes with a blood drain which makes it lighter. This is DG - double guard version. Defender comes with black kydex sheath fitting the M.O.L.L.E. system.
€188.05

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Tactical knife Extrema Ratio A.M.F. Black
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Fixed blade Knife Extrema Ratio A.M.F. Black 20.6cm 04.1000.0485BLK
Extrema Ratio A.M.F. (Advanced Multi Function) Black is a 20,6 cm blade knife inspired to a legend in the survival cutlery of the 80es. It can be easily disassembled. 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 also in desert version.
€335.48

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Neck knife Extrema Ratio Kiri Dark Stone 04.1000.0187/BLK-SW 6cm
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Fixed blade Knife Extrema Ratio Kiri Dark Stone 6cm 0410000187BLKSW
Neck knife Extrema Ratio Kiri Dark Stone 04.1000.0187/BLK-SW 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.
€210.33

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Neck knife Extrema Ratio Kiri Satin 04.1000.0187/SAT 6cm
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Fixed blade Knife 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

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Dagger Extrema Ratio Adra Ordinanza 17 Stormo 17.8cm
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Fixed blade Knife Extrema Ratio Adra Ordinanza 17 Stormo 17.8cm
Extrema Ratio Adra Ordinanza 17 Stormo dagger with black oxide-coated blade 178 mm (7 in) and 17th Stormo logo, serrated partly. 
The “Arditi Distruttori della Regia Aeronautica” (lit. royal air force brave destroyers) were an Italian battalion serving in the North African theater during WW2, and awarded two silver medals of honor.
This ADRA dagger, with its classic European shape, was designed for and with strong input from the commanders and operatives of the 17th. Comes in in ABS engraved case with an ankle sheath and a sand-color parade belt sheath. Total length 311 mm (12.2 in). Weight 331 g (11.7 oz) 
€502.42

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Folding knife Extrema Ratio BD4 Adra Contractor 041000498TM 12.3cm
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Folding knife Extrema Ratio BD4 Adra Contractor 12.3cm 041000498TM
Extrema Ratio BD4 Adra Contactor is available in a limited edition of 70 pieces. It comes inside a certified IP67 waterproof polypropylene technical case with pressurization valve resistant to atmospheric agents, dust and shocks; this includes a scroll outlining the past and present of the 17th Stormo Incursori of the Italian Air Force and a metal plate bearing the progressive number within the limited series.
€276.48

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Folding knife Extrema Ratio T-Razor Black 04.1000.0138/BLK 10cm - 4
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Folding knife Extrema Ratio T-Razor Black 10cm 0410000138BLK
Extrema Ratio T-Razor with black coating. Up to the early 1900s, people commonly carried pocket utility knives. Due to rampant “misuse”, though, laws were passed to the effect that all such knives were to be clipped at the blade-tip, in order to diminish their dangerousness as weapons. Some people then figured they’d get the greatest effectiveness out of the sharp edge of a traditionally flat-point blade shape, and took to carrying straight-razors. Thus, the straight-razor was for a time regarded as a fearsome weapon of self-defense. Such a “misuse” of the common straight-razor inspired our T-RAZOR design. Available versions: T-RAZOR BLACK, T-RAZOR SATIN.
€208.06

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Dagger Extrema Ratio Suppressor Operativo 0410000312BLK 17.6cm
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Fixed blade Knife Extrema Ratio Suppressor Operativo 17.6cm 0410000312BLK
Suppressor Operativo dagger from Extrema Ratio is the memorial dagger, issued to commemorate the thirtieth anniversary of the unit G.I.S., the renowned counter-terrorism unit of the Carabinieri (Italian military police). Black oxide-coated blade 176 mm (6,9 in), without logo, Böhler N690 steel. Side sheath included. Weight 302 g (10.7 oz)
€408.87

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Folding knife Extrema Ratio MF1 Black 0410000133BLK 9.2cm
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Folding knife Extrema Ratio MF1 Black 9.2cm 0410000133BLK
Extrema Ratio MF1 Black medium folder. Blade length is 92 mm. Same as other Extrema Ratio knives this model has blade made of BÖHLER N690 steel. Anticorodal anodized aluminum handle. Extrema Ratio MF1 Black weights 166 g. 
€255.65

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Folding knife Extrema Ratio Glauca G1 04.1000.0179-TM 11.2cm
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Folding knife Extrema Ratio Glauca G1 11.2cm 0410000179-TM
Glauca G1, a new version of the Glauca Exrema Ratio knife, is designed specifically for the famous GSG9 - a unit of the Italian Federal Police. The Glauca G1 knife is officially included in the police arsenal. The handle is made of tactical colored anodized aluminum. The knife is equipped with a glass breaker and a pocket clip that can be installed in different positions. Additionally, the knife is equipped with an awl and a folding rescue tool. Glauca G1 Exrema Ratio has a Liner lock and an additional safety lock. The Drop Point blade is made of Böhler N690 steel with a black finish.
€372.89

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Tactical knife Extrema Ratio Fulcrum Bayonet NFG Desert
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Fixed blade Knife Extrema Ratio Fulcrum Bayonet NFG Desert SW 18cm 0410000310DW
A versatile and extremely tough knife Extrema Ratio Fulcrum Bayonet NFG Desert SW it is a light version of the standard Fulcrum Bayonet. It comes with wire cutter, stone washed blade, desert handle and desert nylon sheath.  This milestone among multipurpose knives, employed on a large scale in Afghanistan as standard issue equipment of the Italian “Nibbio” mission, originated with a COMALP Alpine Troops Command experimental project for renewing trooper equipment. 
€265.32

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Folding knife Extrema Ratio T-Razor Satin 04.1000.0138/SAT 10cm - 1
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Folding knife Extrema Ratio T-Razor Satin 10cm 04.1000.0138/SAT
Extrema Ratio T-Razor folder with satin blade. Up to the early 1900s, people commonly carried pocket utility knives. Due to rampant “misuse”, though, laws were passed to the effect that all such knives were to be clipped at the blade-tip, in order to diminish their dangerousness as weapons. Some people then figured they’d get the greatest effectiveness out of the sharp edge of a traditionally flat-point blade shape, and took to carrying straight-razors. Thus, the straight-razor was for a time regarded as a fearsome weapon of self-defense. Such a “misuse” of the common straight-razor inspired our T-RAZOR design. Available versions: T-RAZOR BLACK, T-RAZOR SATIN.
€212.10

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Tactical knife Extrema Ratio Adra Operativa 0410000313BLK-OP 17.8cm
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Fixed blade Knife Extrema Ratio Adra Operativa 17.8cm 0410000313BLK-OP
The “Arditi Distruttori della Regia Aeronautica” (lit. royal air force brave destroyers) were an Italian battalion serving in the North African theater during WW2, and awarded two silver medals of honor. They were tasked with complex sabotage operations against enemy airfields, which they accomplished employing then unprecedented guerrilla tactics. Now the 17° Stormo Incursori (17th Raiders Wing) of the Italian Air Force picks up their glorious heritage as a special force. As a tangible token of continuity, members of the 17th line up and parade carrying combat daggers at their belts, as the Arditi used to carry. This ADRA dagger, with its classic European shape, was designed for and with strong input from the commanders and operatives of the 17th. Thus begins its road of honor and duty. ADRA OPERATIVA is the black oxide-coated version, no logo, calf sheath included.
€408.87

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Extrema Ratio knives are a part of equipment of many special military units of Italy, the police and rescue services. Each model is developed very carefully and undergoes a series of rigorous tests before it is put into production. Extrema Ratio cooperates with the University of Perugia, where scientists conduct a number of studies determining the ergonomics of Extrema Ratio products and methods for improving it. The office of Extrema Ratio is located in Prato, Italy.

Both Extreme Ratio tactical knives and EDC knives are distinguished by impeccable quality. Most knives are made of Austrian steel N690, which is famous for its high content of molybdenum and cobalt and is highly corrosion resistant. Due to this, N690 steel has increased strength and resists shock loads well. The most popular Extrema Ratio knives are Fulcrum, Col Moschin, RAO, Adra and others. Extrema Ratio also produces several lines of tactical folding knives: BF (basic folder), MF (medium folder), BD4, BD2 series and other knives. In our store you can buy Extrema Ratio tactical knives, as well as folding and EDC knives of this brand. MyGoodKnife is the official distributor of Extrema Ratio.