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Extrema Ratio

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14 Items

  1. ExtremaRatio - KIRI Neck Knife - N690Co Dark Stone Washed - Kiridashi Knife

    The kiridashi is a traditional Japanese cutting tool that has ancient roots in culture and tradition; Extrema Ratio has revised according to its style this knife belonging to Japanese tradition giving it a more tactical look than the original. While retaining the characteristic chisel rounding, KIRI has a special tip designed to achieve a high penetration efficiency. 

    Extrema Ratio KIRI is available in Dark Stone and Satin finishes, both made of Böhler N690 steel hardened to 58HRC. The handle consists of two black-colored anodized anticorodal aluminum grips. The preshaped Kydex sheath is equipped with metal eyelets that allow paracord lanyard to be attached to MOLLE system platforms as well.


    Intended use: Neck knife / Utility

    Type of production: industrial
    Country of production: Italy
    Blade: stainless steel N690Co 58/60HRC
    Blade treatment: Dark Stone Washed
    Handle: stainless steel N690Co 58/60HRC
    Blade length: 60mm.
    Blade thickness: 5mm.
    Total length: 190mm.
    Weight: 112g.
    Sheath: in Kydex, for neck
    Packaging: cardboard box with Extrema Ratio logos
    Notes: possibility of using the scabbard with Ulti-Clip, M.O.L.L.E. or Tek-Lok systems (may be purchased separately)

    ER-KIRI-DSW
    €216.39
    Only 3 left
    Only 3 left
  2. ExtremaRatio - KIRI Neck Knife - N690Co Satin - Kiridashi Knife

    The kiridashi is a traditional Japanese cutting tool that has ancient roots in culture and tradition; Extrema Ratio has revised according to its style this knife belonging to Japanese tradition giving it a more tactical look than the original. While maintaining the characteristic chisel rounding, KIRI has a special tip designed to achieve a high penetration efficiency. 

    Extrema Ratio KIRI is available in Dark Stone and Satin finishes, both made of Böhler N690 steel hardened to 58HRC. The handle consists of two black-colored anodized anticorodal aluminum grips. The preshaped Kydex sheath is equipped with metal eyelets that allow paracord lanyard to be attached to MOLLE system platforms as well.


    Intended use: Neck knife / Utility

    Type of production: industrial
    Country of production: Italy
    Blade: stainless steel N690Co 58/60HRC
    Blade treatment: satin finish
    Handle: stainless steel N690Co 58/60HRC
    Blade length: 60mm.
    Blade thickness: 5mm.
    Total length: 190mm.
    Weight: 112g.
    Sheath: in Kydex, for neck
    Packaging: cardboard box with Extrema Ratio logos
    Notes: possibility of using the scabbard with Ulti-Clip, M.O.L.L.E. or Tek-Lok systems (may be purchased separately)

    ER-KIRI-SA
    €211.48
    Only 1 left
    Only 1 left
  3. ExtremaRatio - BF2TTS Wardog knife - PRIVATE COLLECTION - Tanto Point - knife

    RETIRED FROM PRIVATE COLLECTION

    Type: Previously Purchased
    Condition: Excellent condition
    Available in stores: No
    Sharpening: Original
    Marks on blade: NO
    Marks on handle: NO
    Packaging: YES
    Sheath: -
    Manuals, Certificates, and Warranties: YES
    Inspected and Certified by our internal laboratory
    Intended use: Tactical/Military

    Type of production: Industrial
    Blade: N690Co 58HRC stainless steel
    Blade Production: Italy
    Handle: Anticorodal
    Blade length: 67mm.
    Blade thickness: 3mm.
    Closed length: 124mm.
    Total length: 192mm.
    Balance: -
    Weight: 130g.
    Closure: Liner Lock
    Clip: Reversible and removable stainless steel
    Sheath: -
    Notes: Safety lock when knife is open

    AP-BF2TTSWD
    €176.23
    Only 1 left
    Only 1 left
  4. ExtremaRatio - K-Talon Karambit - N690 Dark Stone Washed - Knife

    The K-Talon is a karambit with a particularly thin full tang structure that, including sheath and grips, reaches a thickness of only 10 mm. The curved, hooked blade is designed inspired by the shape of a claw. It is designed to achieve precise, deep cuts while simultaneously hooking, trapping and/or ripping.

    The back ring is designed to achieve a strong and secure grip in all conditions preventing the knife from sliding back and making it exceptionally difficult to disarm or turn against the user.

    The very thin Kydex sheath has a quick release and comes with paracord that allows it to be used as a neck knife or attached to MOLLE-system platforms.

     

    Intended use: tactical

    Type of production: industrial
    Country of production: Italy
    Blade: full tang, stainless steel N690Co 58/60HRC
    Blade finish: Dark Stone Washed
    Handle: anodized anticorodal aluminum
    Blade length: 70mm.
    Blade thickness: 4mm.
    Total length: 175mm.
    Weight: 130g.
    Sheath: Kydex
    Packaging: cardboard box with Extrema Ratio logos
    Notes: possibility of using the scabbard with multi-position, M.O.L.L.E.-compatible attachment systems.

    ER-KTAL-DS
    €231.97
    Only 98 left
    Only 98 left
    Rating:
    87%
    4.4
  5. ExtremaRatio - Satre - S600 Black EXP Dark - Neck Knife

    Satre is a fixed blade knife of small dimensions, light and extremely resistant. Given its characteristics, it can be used in a wide range of disciplines and uses ranging from survival activities, bushcraft or as an element of an EDC (Every Day Carry) kit.

    It has been designed in collaboration with Daniele Dal Canto, Master Advanced F.I.S.S. (Federazione italiana survival sportivo e sperimentale) instructor.

    In Neck Knife mode, through the use of a 550 paracord lanyard, it is possible to hold it around the neck keeping the knife vertical with the handle facing downwards. The metal eyelets on the sheath, made of pre-shaped Kydex, allow the application of both the lanyard and the accessory holder.

    The full-tang skeleton structure allows to personalize the knife using the Paracord as a coating for the handle.

    The Black S600 version uses Böhler S600 steel. This steel is used in industrial manufacturing to make metalworking tools and in mold making.

    The high content of Molybdenum, Tungsten and a good presence of Vanadium in its chemical composition, give it excellent qualities of hardness, wear resistance and toughness. The presence of Cobalt favors the formation of small carbides uniformly distributed, a characteristic that enhances and elevates wear resistance.

    Satre S600 is hardened and cryogenically treated, thus reaching an exceptional hardness of 64 HRC. This gives it great wear resistance and the ability to guarantee the cutting edge of the wire for a long time.

    Böhler S600 has 4.5% Chromium, which makes it a carbon steel and therefore can cause rust and oxidation if neglected. To better protect it from atmospheric agents, we have chosen the new external coating EXP DARK.

    The high hardness and resistance to wear and abrasion, make this steel not easy to sharpen.

     

    Intended Use: Neck Knife / Hiking / Utility

    Production type: industrial
    Country of production: Italy
    Blade: Carbon steel Bohler S600 64HRC
    Blade treatment: Black EXP DARK
    Handle:in carbon steel Bohler S600 64HRC
    Blade length: 70mm.
    Blade thickness: 5mm.
    Total length: 163mm.
    Weight: 78g.
    Scabbard: Kydex, for neck.
    Packaging: Cardboard box with Extrema Ratio logos.
    Notes: possibility to use the scabbard with Ulti-Clip, M.O.L.L.E. or Tek-Lok systems (available separately).

    ER-SAT-S6
    €138.52
    Only 1 left
    Only 1 left
    Rating:
    98%
    4.9
  6. ExtremaRatio - BD0 R - Desert - Stone Washed - knife

    It is a small basic folder, produced with a technopolymer handle that enhances its resistance and lightness, thanks also to the steel frame. The blade locking mechanism is the tried and tested LINER-LOCK. The model maintains all the features of the previous BF0 model, updated with the new High Speed Razor Opening opening system and with a Sear Point blade.

    Type of production: industrial
    Blade: stainless steel N690Co 58HRC
    Country of production: Italy
    Handle: Nylon with stainless steel folders
    Blade length: 60mm.
    Blade thickness: 2.5mm.
    Length closed: 95mm.
    Total length: 145mm.
    Weight: 52g.
    Closure: Liner Lock
    Clip: reversible and removable, in stainless steel

    ER-BD0R-DE
    €79.51
    Only 1 left
    Only 1 left
  7. ExtremaRatio - BD0 R - Ranger Green - Stone Washed - knife

    It is a small basic folder, produced with a technopolymer handle that enhances its resistance and lightness, thanks also to the steel frame. The blade locking mechanism is the tried and tested LINER-LOCK. The model maintains all the features of the previous BF0 model, updated with the new High Speed Razor Opening opening system and with a Sear Point blade.

    Type of production: industrial
    Blade: stainless steel N690Co 58HRC
    Country of production: Italy
    Handle: Nylon with stainless steel folders
    Blade length: 60mm.
    Blade thickness: 2.5mm.
    Length closed: 95mm.
    Total length: 145mm.
    Weight: 52g.
    Closure: Liner Lock
    Clip: reversible and removable, in stainless steel

    ER-BD0R-RG
    €79.51
    Only 1 left
    Only 1 left
    Rating:
    93%
    4.7
  8. ExtremaRatio - BD0 R - HCS - Stone Washed - knife

    It is a small basic folder, produced with a technopolymer handle that enhances its resistance and lightness, thanks also to the steel frame. The blade locking mechanism is the tried and tested LINER-LOCK. The model maintains all the features of the previous BF0 model, updated with the new High Speed Razor Opening opening system and with a Sear Point blade.

    Type of production: industrial
    Blade: stainless steel N690Co 58HRC
    Country of production: Italy
    Handle: Nylon with stainless steel folders
    Blade length: 60mm.
    Blade thickness: 2.5mm.
    Length closed: 95mm.
    Total length: 145mm.
    Weight: 52g.
    Closure: Liner Lock
    Clip: reversible and removable, in stainless steel

    ER-BD0R-HC
    €79.51
    Only 1 left
    Only 1 left
  9. ExtremaRatio - BD0 R - Black - Stone Washed - knife

    It is a small basic folder, produced with a technopolymer handle that enhances its resistance and lightness, thanks also to the steel frame. The blade locking mechanism is the tried and tested LINER-LOCK. The model maintains all the features of the previous BF0 model, updated with the new High Speed Razor Opening opening system and with a Sear Point blade.

    Type of production: industrial
    Blade: stainless steel N690Co 58HRC
    Country of production: Italy
    Handle: Nylon with stainless steel folders
    Blade length: 60mm.
    Blade thickness: 2.5mm.
    Length closed: 95mm.
    Total length: 145mm.
    Weight: 52g.
    Closure: Liner Lock
    Clip: reversible and removable, in stainless steel

    ER-BD0R-BK
    €79.51
    Only 1 left
    Only 1 left
  10. ExtremaRatio - BF2 V Stone Washed Knife - Sailing Knife

    This knife was designed and perfected in every detail for its primary use in the marine environment. The blade has a flat rounding that allows symmetrical cutting work with wider support. The tip, on the other hand, which is thick and durable thanks to the tanto version, allows greater penetration and a sharper, more precise cut. The stone washed finish process facilitates locating in the marine environment.

    The structure of the handle, made of anodized anticorodal aluminum, features a design with milling in concentric circles and lightening and anti-slip perforations so as to facilitate rinsing from saltiness. A small slot is cut into the middle of the cheek piece to allow for tightening or releasing smaller shackles. BF2 V is equipped with reversible clip; adjusting screw retainer for closing and opening the blade; 70-mm. knot shock ankle with fastening mechanism; and correctable. The presentation of the BF2 V took place on the Amerigo Vespucci School Ship.




    Intended use: sporting/nautical

    Type of production: industrial
    Blade: stainless steel N690Co 58HRC with Stone Washed finish
    Country of Production: Italy
    Handle: Anticorodal with stainless steel reinforcements
    Blade length: 65mm.
    Blade thickness: 3mm.
    Length closed: 124mm.
    Total length: 190mm.
    Weight: 149g.
    Closure: Liner Lock
    Clip: reversible and removable stainless steel
    Notes: Anklet/knife lock - Small sized turnbuckle - Quick-release tactical corrector - Open knife safety catch - Safety catch for Anklet/knife lock

    ER-BF2V
    €188.52
    Only 2 left
    Only 2 left
  11. ExtremaRatio - K-Talon Karambit - N690 Stone Washed - Knife

    The K-Talon is a karambit with a particularly thin full tang structure that, including sheath and grips, reaches a thickness of only 10 mm. The curved, hooked blade is designed inspired by the shape of a claw. It is designed to achieve precise, deep cuts while simultaneously hooking, trapping and/or ripping.

    The back ring is designed to achieve a strong and secure grip in all conditions preventing the knife from sliding back and making it exceptionally difficult to disarm or turn against the user.

    The very thin Kydex sheath has a quick release and comes with paracord that allows it to be used as a neck knife or attached to MOLLE-system platforms.

     

    Intended use: tactical

    Type of production: industrial
    Country of production: Italy
    Blade: full tang, stainless steel N690Co 58/60HRC
    Blade finish: Stone Washed
    Handle: anodized anticorodal aluminum
    Blade length: 70mm.
    Blade thickness: 4mm.
    Total length: 175mm.
    Weight: 130g.
    Sheath: Kydex
    Packaging: cardboard box with Extrema Ratio logos
    Notes: possibility of using the scabbard with multi-position, M.O.L.L.E.-compatible attachment systems.

    ER-KTAL-SW
    €224.59
    Only 0 left
    Only 0 left
    Rating:
    87%
    4.4
    Out of stock
  12. ExtremaRatio - Satre Expeditions - Utility Neck Knife - Knife

    Satre Expeditions, as well as the Satre model from which it derives, is a fixed blade knife of small dimensions, light and extremely resistant. Given its characteristics, it can be used in a wide range of disciplines and uses or as part of an EDC (Every Day Carry) kit.

    It has been designed in collaboration with Daniele Dal Canto, Master Advanced F.I.S.S. (Federazione italiana survival sportivo e sperimentale) instructor. In Neck Knife mode, through the use of a 550 paracord lanyard, it is possible to hold it around the neck keeping the knife vertical with the handle facing downwards.

    The metal eyelets on the sheath, made of pre-shaped Kydex, allow the application of both the lanyard and the accessory holder. 

    The full-tang skeletonized structure, allows you to customize the knife using Paracord as a coating for the handle.

    Satre Expeditions uses Böhler N690 steel heat treated to 58 HRC with MIL-C-13924 burnishing and stone washed surface treatment (Dark Stone finish). It comes with a desert-colored pre-formed kydex sheath on which you can attach the Firesteel for lighting fires (provided inside the box).

     

     

    Intended use: Neck knife / Hiking / Utility

    Production type: industrial
    Country of production: Italy
    Blade: Stainless steel N690Co 58
    Blade finish: Burnishing MIL-C-13924 with Dark Stone finish
    Handle: Stainless steel N690Co 58
    Blade length: 70mm.
    Blade thickness: 5mm.
    Total length: 163mm.
    Weight: 78g.
    Scabbard: Kydex, for neck.
    Packaging: Cardboard box with Extrema Ratio logos.
    Notes:Designed and developed thanks to the collaboration with the instructor Daniele del Canto of F.I.S.S.S. (Federazione Italiana Survival Spotivo e Sperimentale).

    ER-SAT-EX
    €143.44
    Only 0 left
    Only 0 left
    Rating:
    100%
    5
    Out of stock
  13. ExtremaRatio - Satre - N690 Black - Neck Knife - Knife

    Satre is a small, light and extremely resistant fixed blade knife. Given its characteristics, it is used in a wide range of disciplines and uses ranging from survival activity, bushcraft or as an element of an EDC (Every Day Carry) kit.

    It was designed in collaboration with Daniele Dal Canto, Master Advanced F.I.S.S.S. (Italian Federation of Sports and Experimental Survival).

    In Neck Knife mode, through the use of a paracord 550 cord, it is possible to keep it around the neck by keeping the knife vertically with the handle facing downwards. The metal eyelets on the sheath made of pre-shaped Kydex allow the application of both the lanyard and the accessory holder.

    The full-tang skeletonized structure allows you to customize the knife using paracord as a coating for the handle

    This Black version uses the Böhler N690 heat treated at 58 HRC. This material is chosen for its resistance to oxidation, the durability of the wire and above all the reliability it has shown over the years.

    Intended use: Neck / Hiking / Utility Knife

    Type of production: industrial
    Country of production: Italy
    Blade: stainless steel N690Co 58 / 60HRC
    Blade treatment: Black
    Handle: stainless steel N690Co 58 / 60HRC
    Blade length: 70mm.
    Blade thickness: 5mm.
    Total length: 163mm.
    Weight: 78 g.
    Sheath: in Kydex, for neck
    Packaging: Cardboard box with Extrema Ratio logos
    Note: possibility to use the sheath with Ulti-Clip systems, M.O.L.L.E. o Tek-Lok (available separately)

    ER-SAT-BL
    €124.59
    Only 0 left
    Only 0 left
    Rating:
    83%
    4.2
    Out of stock
  14. ExtremaRatio - Satre - N690 Stone Washed - Neck Knife

    Satre is a fixed blade knife of small dimensions, light and extremely resistant. Given its characteristics, it can be used in a wide range of disciplines and uses ranging from survival activities, bushcraft or as an element of an EDC (Every Day Carry) kit.

    It has been designed in collaboration with Daniele Dal Canto, Master Advanced F.I.S.S. (Federazione italiana survival sportivo e sperimentale) instructor.

    In Neck Knife mode, through the use of a 550 paracord lanyard, it is possible to hold it around the neck keeping the knife vertical with the handle facing downwards. The metal eyelets on the sheath, made of pre-shaped Kydex, allow the application of both the lanyard and the accessory holder.

    The full-tang skeleton structure, allows to personalize the knife using the Paracord as a coating for the handle.

    The Stone Washed version uses Böhler N690 heat treated to 58 HRC. This material is chosen for its ability to resist oxidation, the durability of the edge and above all the reliability it has shown over the years.

     


    Intended Use: Neck Knife / Hiking / Utility

    Type of production: industrial
    Country of production: Italy
    Blade: Stainless steel N690Co 58/60HRC
    Blade Treatment: Stone Washed
    Handle: Stainless steel N690Co 58/60HRC
    Blade length: 70mm.
    Blade thickness: 5mm.
    Total lenght: 163mm.
    Weight: 78g.
    Scabbard: Kydex, for neck.
    Packaging: Cardboard box with Extrema Ratio logos.
    Notes: possibility to use the scabbard with Ulti-Clip, M.O.L.L.E. or Tek-Lok systems (available separately).

    ER-SAT-SW
    €119.67
    Only 0 left
    Only 0 left
    Rating:
    94%
    4.7
    Out of stock
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