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Extrema Ratio


Tactical folding and fixed blade knives designed and build for military use from Italy since 1997. Each Extrema Ratio knife that is manufactured has measured up to the Company rigorous standards for quality and performance. All of the knives are made from N690 Cobalt Steel which is a steel from Austria. This steel offers great strength and flexibility with the capability to take and retain a razor sharp edge.
This short bladed military dagger is the compact version of the Fulcrum. It has the same solid and robust characteristics. Blade length: 11 cm. N690 (58HRC) steel. Automatic hard sheath with tek-lok.
product number: ER150FULCTES
Score: 9.6 / 10 (3 reviews)
£ 172.50
Combat dagger with asymmetric blade. Length blade: 16 cm. Boehler N690 steel (58HRC). Commissioned and officially adopted in 2002 by the Ninth Rgt. Incursori "Col. Moschin
product number: ER125COLMOS
Score: 8.7 / 10 (1 review)
£ 270.00
The RAO is a compact tactical folding knife with a strong and heavy blade and a very safe locking system. Blade length: 12 cm. Bohler N690 steel (58HRC). Sheath compatible to military M.O.L.L.E. system. Provided with engraved motto of the 185° RAO.
product number: ER130RAO
Score: 9.2 / 10 (6 reviews)
£ 245.00
A truly versatile "back up" knife with striking combat qualities. Blade length 11 cm. Blade steel N690 (58HRC). Provided with tek-lok sheath.
product number: ER160SHRTESOG
Score: 9.7 / 10 (3 reviews)
£ 167.50
A truly versatile "back up" knife with striking combat qualities. Blade length 11 cm. Blade steel N690 (58HRC). Provided with tek-lok sheath.
product number: ER160SHRDW
£ 173.00
Extremely compact-folding knives developed by the cooperation with military and law enforcement personnel. Folding knife for everyday carry, simple, essential and functional. Classical handle provided with bridge-clip. Blade “tanto” pointed. Blade length 7 cm.
product number: ER135BF1CT
Score: 9 / 10 (2 reviews)
£ 110.00
This short bladed military dagger is the compact version of the Fulcrum. It has the same solid and robust characteristics. Blade length: 11 cm. N690 (58HRC) steel. Automatic hard sheath with tek-lok.
product number: ER150FULCDW
£ 185.00
Double-edged fixed blade knife intended for use as a military back-up knife or boot dagger.
product number: ER314PUGIOBL
£ 252.20
Pocket knife from Extrema Ratio with several new options. The BF M1A1 obviously has a really sturdy blade but also features a scredriver, a bottle and can opener and a marlin spike.
product number: ER135BFM1A1
£ 114.70
Fixed blade knife, developed in collaboration with military dive teams and civilian underwater operation experts. The Ultramarine model is particularly suitable for use underwater and under challenging and hard conditions.
product number: ER320ULTRAC
£ 425.00
Extremely compact-folding knives developed by the cooperation with military and law enforcement personnel. Folding knife for everyday carry, simple, essential and functional. Classical handle provided with bridge-clip. “Drop” pointed blade. Blade length 7 cm.
product number: ER135BF1CD
Score: 9.3 / 10 (1 review)
£ 110.00
"Full size" folding knives, suitable for professional use by the military and law enforcement. Classical handle provided with bridge-clip. “Tanto” pointed blade. Blade length: 8,5 cm.
product number: ER135BF2CT
Score: 9 / 10 (1 review)
£ 135.00
"Full size" folding knives, suitable for professional use by the military and law enforcement. Classical handle provided with bridge-clip. “Drop” pointed blade. Blade length: 8,5 cm. Desert style coating.
product number: ER135BF2WCD
£ 162.50
"Full size" folding knives, suitable for professional use by the military and law enforcement. Classical handle provided with bridge-clip. “Tanto” pointed blade. Blade length: 8,5 cm. Desert style coating.<
product number: ER135BF2WCT
£ 162.50
Tactical all round folder. Bohler N690 steel (58HRC). Blade 12 cm. Liner Lock
product number: ER135BF3
Score: 9 / 10 (1 review)
£ 147.50
Tactical medium folder with rear glass breaker, reversible clip and semi-assisted opening. Length blade: 9,2 cm
product number: ER133MF1
Score: 9.7 / 10 (1 review)
£ 232.50
Tactical medium folder with rear glass breaker, belt-cutter, reversible clip and semi-assisted opening. Length blade: 9,2 cm
product number: ER133MF1BC
Score: 10 / 10 (1 review)
£ 242.50
Tactical medium folder with rear glass breaker, sub-hilt, reversible clip and semi-assisted opening. Length blade: 11 cm
product number: ER133MF2
£ 270.00
Tactical medium folder with rear glass breaker, reversible clip and semi-assisted opening. Length blade: 11,2 cm. Provided with Ninth Rgt. Incursori "Col. Moschin" logo.
product number: ER133MF2COLMOS
£ 307.50
Robust tactical dagger manufactured from Bohler N690 (58HRC) steel. Blade length 18 cm. Durable Nylon grip handle. Design based on the legendary MARK 2, one of the most popular knives used during WWII. Includes HCS coyote sheath, specially designed for SOF units.
product number: ERMK2DW
£ 309.95
Robust tactical dagger manufactured from Bohler N690 (58HRC) steel. Blade length 18 cm. Durable Nylon grip handle. Design based on the legendary MARK 2, one of the most popular knives used during WWII. Includes sturdy black sheath which meets the military MOLLE requirements.
product number: ERMK2B
£ 282.95
The MPC (Mulit Purpose Compact) is a robust folding knife, with the blade in "drop" version. Provided with upper hilt, back lock and pocket clip. Blade length: 11,5 cm.
product number: ER136MPC
£ 337.50
The Nemesis is a robust folding knife with the same structure as the M.P.C. Bohler N690 steel (58HRC). Blade length 11,5 cm. Provided with “back lock” system and pocket clip.
product number: ER136NEM
£ 322.50
Tactical dagger. Blade: Boehler N690 steel (58HRC) Handle: polyamide (NATO MIL-SPEC elastomer with high grip finish. Provided with G.I.S. (Gruppo Intervento Speciale) logo. Blade length 18 cm.
product number: ER312SUPORGIS
£ 372.50
Tactical dagger. Blade: Boehler N690 steel (58HRC) Handle: polyamide (NATO MIL-SPEC elastomer wiyh high grip finish. Blade length 18 cm.
product number: ER312SUPP
£ 372.50
Tactical dagger. Blade: Boehler N690 steel (58HRC) Handle: polyamide (NATO MIL-SPEC elastomer with high grip finish. Special limited edition for the thirtieth anniversary off the Gruppo Intervento Speciale (GIS).
product number: ER312SUPTRENGI
£ 600.00
Combat dagger made of Bohler N690 (58HRC) steel. Blade length 17,8 cm. Originally used by the A.D.R.A. (Arditi Distruttori Regia Aeronautica)
product number: ER313ADRAOP
£ 372.50
Combat dagger made of Bohler N690 (58HRC) steel. Blade length 17,8 cm. Originally used by the A.D.R.A. (Arditi Distruttori Regia Aeronautica) and nowadays by the 17° Stormo Incursori. Engraved with 17° Stormo logo.
product number: ER313ADRAORRIA
£ 457.50
Combat dagger made of Bohler N690 (58HRC) steel. Blade length 17,8 cm. ADRA Special Edition 17° Stormo, numbered but not in limited edition. Comes with 17° Stormo logo and motto and ceremonial belt sheath.
product number: ER313ADRASPRIA
£ 600.00
Restyling of the famous "Pugnale da paracadutista assaltatore mod.1939" supported by the Italian C.O.F.S. (Comando Operativo Forze Speciali). Blade length 19 cm. Provided with C.O.F.S. logo and motto en comes in ABS engraved case with two sheaths
product number: ER33039-09COFS
£ 457.50
Restyling of the famous "Pugnale da paracadutista assaltatore mod.1939" supported by the Italian C.O.F.S. (Comando Operativo Forze Speciali). Blade length 19 cm.
product number: ER33039-09OPER
Score: 9 / 10 (1 review)
£ 312.50
Restyling of the famous "Pugnale da paracadutista assaltatore mod.1939" supported by the Italian C.O.F.S. (Comando Operativo Forze Speciali). Blade length 19 cm. This special version is numbered but not in limited edition. It has a wooden handle and satin finished blade
product number: ER33039-09SPED
£ 595.00
Multipurpose military dagger. Employed on a large scale in Afghanistan as standard equipment by the members of the Italian mission "Nibbio". Blade length 180 mm. N690 (58HRC) steel. Automatic hard sheath.
product number: ER082FULTES
£ 255.00
The Extrema Ratio Fulcrum E.I. is a military dagger with a strong structure which is supplied to the Italian Army in 2003. Engraved with the Italian Army logo: EI. Bohler N690 steel (58HRC). Length blade: 18 cm.
product number: ER083FULEI
£ 255.00
This model is the evolution of the Fulcrum Folder (out of production since 2005), the first folding knife produced by Extrema Ratio according to the specifics of an Italian anti-terrorism unit. Length blade: 9,5 cm. N690 steel (58HRC). Back lock. Drop blade.
product number: ER136FFIID
£ 292.50
The Venom is a multi-purpose knife of great usefulness in hunting and outdoor sports activity. Blade length: 18 cm. Blade of N690 steel (58HRC). Provided with calf sheath.
product number: ER126VENTES
Score: 10 / 10 (1 review)
£ 249.95
The Venom is a multi-purpose knife of great usefulness in hunting and outdoor sports activity. Blade length: 18 cm. Blade of N690 steel (58HRC). Provided with calf sheath.
product number: ER126VENTESG
£ 249.95
The Extrema Ratio KS is a more compact and versatile machete with a forward cut ideal for individual equipment. Blade length: 24,5 cm. Blade steel: N690 (54HRC). Including semi-rigid calf sheath.
product number: ER170KS
Score: 8 / 10 (1 review)
£ 275.00
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