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Extrema Ratio knives and folding knives

Extrema Ratio, located in Prato, Italy has been designing, manufacturing and selling high-quality combat knives since 1997. The company gained a great reputation for excellence that is unsurpassed in the military and tactical industry. The company prides itself in design, material and quality to deliver a high end product that meets the most severe standards. The first class handwork and well-selected material have contributed to form the image of the Extrema Ratio trademark all over the world.

New Arrivals
Popular Models

Satre F Nitrogen Outdoor

Satre F Nitrogen Black Yellow

Satre F Nitrogen Black Orange

Satre F Nitrogen Black Periwinkle

Satre F N690 Black Stonewashed

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Selvans Black, green sheath

BF2 V Stonewashed

F.O.K. Nitrogen Outdoor

Harpoon F Evo Limited Edition

Blade length: 6.1″Blade length: 2.56″Blade length: 5.04″Blade length: 8.23″

Blade material: Böhler N690Blade material: Böhler N690Blade material: NitrogenBlade material: Böhler N690

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RAO Steel Nitrogen Satin

Round Patch 85mm Brown

Dicok TS

Satre FX S600 Black

Blade length: 3.43″Blade length: 3.19″Blade length: 3.74″

Blade material: NitrogenBlade material: NitrogenBlade material: Böhler S600

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ANT SP Total Black

BD2 Contractor

LKU01 Urban Dark

MF1 EVO Drop Point Red Satin M390

Blade length: 1.81″Blade length: 3.7″Blade length: 3.94″Blade length: 3.74″

Blade material: Böhler N690Blade material: Böhler N690Blade material: Böhler N690Blade material: M390

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RAO Steel N690

Resolza 12

Satre F N690 Black

Satre FX N690 Stonewashed

Blade length: 3.43″Blade length: 4.72″Blade length: 2.83″Blade length: 3.74″

Blade material: N690Blade material: Böhler N690Blade material: Böhler N690Blade material: Böhler N690

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Sethlans S600 Outdoor

T911 Rescue

Arditi Black

BF2

Blade length: 4.21″Blade length: 2.99″Blade length: 6.57″Blade length: 3.43″

Blade material: Böhler S600Blade material: Böhler N690Blade material: Böhler N690Blade material: Böhler N690

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BFK Zero Folgore

Caimano Nero N.A. manual folder

Col Moschin

Col Moschin Compact

Blade length: 2.64″Blade length: 3.74″Blade length: 6.3″Blade length: 4.33″

Blade material: VG-10Blade material: Böhler N690Blade material: Böhler N690Blade material: Böhler N690

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Contact

Dual Grit Sharpener And Firesteel Pocket Kit

Estrema

Estrema Hammer

Blade length: 6.38″Blade length: 3.15″

Blade material: Böhler N690Blade material: Böhler N690

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Folgore Nitrogen

Folgore Verticale M390

Frame Rock Titan, black

Herring

Blade length: 5.04″Blade length: 5.04″Blade length: 2.95″Blade length: 6.57″

Blade material: NitrogenBlade material: Böhler M390Blade material: Böhler N690Blade material: Böhler N690

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KH Satin

Kreios

LKU01 Urban Sideral

MF1 EVO D Nitrogen, black

Blade length: 13.39″Blade length: 11.81″Blade length: 3.94″Blade length: 3.82″

Blade material: Böhler N690Blade material: Böhler N690Blade material: Böhler N690Blade material: Nitrogen

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Extrema Ratio - Selvans Black, green sheath

Extrema Ratio –
Selvans Black, green sheath

Blade length: 6.1″

Blade material: Böhler N690

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Extrema Ratio - BF2 V Stonewashed

Extrema Ratio –
BF2 V Stonewashed

Blade length: 2.56″

Blade material: Böhler N690

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Extrema Ratio - F.O.K. Nitrogen Outdoor

Extrema Ratio –
F.O.K. Nitrogen Outdoor

Blade length: 5.04″

Blade material: Nitrogen

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Extrema Ratio - Harpoon F Evo Limited Edition

Extrema Ratio –
Harpoon F Evo Limited Edition

Blade length: 8.23″

Blade material: Böhler N690

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Extrema Ratio - RAO Steel Nitrogen Satin

Extrema Ratio –
RAO Steel Nitrogen Satin

Blade length: 3.43″

Blade material: Nitrogen

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Extrema Ratio - Round Patch 85mm Brown

Extrema Ratio –
Round Patch 85mm Brown

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Extrema Ratio - Dicok TS

Extrema Ratio –
Dicok TS

Blade length: 3.19″

Blade material: Nitrogen

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Extrema Ratio - Satre FX S600 Black

Extrema Ratio –
Satre FX S600 Black

Blade length: 3.74″

Blade material: Böhler S600

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Extrema Ratio - ANT SP Total Black

Extrema Ratio –
ANT SP Total Black

Blade length: 1.81″

Blade material: Böhler N690

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Extrema Ratio - BD2 Contractor

Extrema Ratio –
BD2 Contractor

Blade length: 3.7″

Blade material: Böhler N690

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Extrema Ratio - LKU01 Urban Dark

Extrema Ratio –
LKU01 Urban Dark

Blade length: 3.94″

Blade material: Böhler N690

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Extrema Ratio - MF1 EVO Drop Point Red Satin M390

Extrema Ratio –
MF1 EVO Drop Point Red Satin M390

Blade length: 3.74″

Blade material: M390

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Extrema Ratio - RAO Steel N690

Extrema Ratio –
RAO Steel N690

Blade length: 3.43″

Blade material: N690

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Extrema Ratio - Resolza 12

Extrema Ratio –
Resolza 12

Blade length: 4.72″

Blade material: Böhler N690

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Extrema Ratio - Satre F N690 Black

Extrema Ratio –
Satre F N690 Black

Blade length: 2.83″

Blade material: Böhler N690

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Extrema Ratio - Satre FX N690 Stonewashed

Extrema Ratio –
Satre FX N690 Stonewashed

Blade length: 3.74″

Blade material: Böhler N690

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Extrema Ratio - Sethlans S600 Outdoor

Extrema Ratio –
Sethlans S600 Outdoor

Blade length: 4.21″

Blade material: Böhler S600

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Extrema Ratio - T911 Rescue

Extrema Ratio –
T911 Rescue

Blade length: 2.99″

Blade material: Böhler N690

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Extrema Ratio - Arditi Black

Extrema Ratio –
Arditi Black

Blade length: 6.57″

Blade material: Böhler N690

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Extrema Ratio - BF2

Extrema Ratio –
BF2

Blade length: 3.43″

Blade material: Böhler N690

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Extrema Ratio - BFK Zero Folgore

Extrema Ratio –
BFK Zero Folgore

Blade length: 2.64″

Blade material: VG-10

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Extrema Ratio - Caimano Nero N.A. manual folder

Extrema Ratio –
Caimano Nero N.A. manual folder

Blade length: 3.74″

Blade material: Böhler N690

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Extrema Ratio - Col Moschin

Extrema Ratio –
Col Moschin

Blade length: 6.3″

Blade material: Böhler N690

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Extrema Ratio - Col Moschin Compact

Extrema Ratio –
Col Moschin Compact

Blade length: 4.33″

Blade material: Böhler N690

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Extrema Ratio - Contact

Extrema Ratio –
Contact

Blade length: 6.38″

Blade material: Böhler N690

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Extrema Ratio - Dual Grit Sharpener And Firesteel Pocket Kit

Extrema Ratio –
Dual Grit Sharpener And Firesteel Pocket Kit

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Extrema Ratio - Estrema

Extrema Ratio –
Estrema

Blade length: 3.15″

Blade material: Böhler N690

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Extrema Ratio - Estrema Hammer

Extrema Ratio –
Estrema Hammer

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Extrema Ratio - Folgore Nitrogen

Extrema Ratio –
Folgore Nitrogen

Blade length: 5.04″

Blade material: Nitrogen

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Extrema Ratio - Folgore Verticale M390

Extrema Ratio –
Folgore Verticale M390

Blade length: 5.04″

Blade material: Böhler M390

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Extrema Ratio - Frame Rock Titan, black

Extrema Ratio –
Frame Rock Titan, black

Blade length: 2.95″

Blade material: Böhler N690

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Extrema Ratio - Herring

Extrema Ratio –
Herring

Blade length: 6.57″

Blade material: Böhler N690

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Extrema Ratio - KH Satin

Extrema Ratio –
KH Satin

Blade length: 13.39″

Blade material: Böhler N690

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Extrema Ratio - Kreios

Extrema Ratio –
Kreios

Blade length: 11.81″

Blade material: Böhler N690

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Extrema Ratio - LKU01 Urban Sideral

Extrema Ratio –
LKU01 Urban Sideral

Blade length: 3.94″

Blade material: Böhler N690

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Extrema Ratio - MF1 EVO D Nitrogen, black

Extrema Ratio –
MF1 EVO D Nitrogen, black

Blade length: 3.82″

Blade material: Nitrogen

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