Knife - Essential Tool for Camping, Outdoor Adventure and collection
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ExtremaRatio - Versa Satin - Utility Neck Knife - Knife
Versa combines innovative design with unparalleled functionality. The name “Versa” perfectly embodies the characteristics of this knife: its versatility makes it suitable for a variety of situations, showing its adaptability both in urban environments as an EDC (Every Day Carry) knife and in more adventurous settings such as outdoor, survival, bushcraft, hunting and even tactical scenarios. It is also ideal as a backup knife. This knife is ready to meet every need by combining style and practicality in one tool. Versa comes in two distinct models: Versa Satin, perfect for everyday use and Versa Expeditions, more suitable in outdoor, survival and bushcraft settings.
Intended Use: Neck Knife / Hiking / Utility
Type of production: industrial
Country of manufacture: Italy
Blade: full tang, stainless steel N690Co at 58HRC
Blade finish: satin finish
Handle: monolithic, pierced, stainless steel N690Co at 58HRC
Blade length: 80mm.
Blade thickness: 6.3mm.
Total length: 180mm.
Weight: 110g.
Sheath: made of Kydex, for neck
Packaging: cardboard box with Extrema Ratio logos
Notes: /ER-VER-SA -
Wander Tactical - Scrambler knife - SanMai V-Toku2 & Black Micarta - custom knife
In collaboration with Wander Tactical we have decided to propose the Scrambler model, in an exclusive satin-blade version that uses the famous Japanese San Mai steel produced by Takefu Steel.
This time, in the rich catalog of products they offer, we have chosen a particular steel with a carbonaceous edge, but with external stainless steel cheeks. Specifically we used, for the central plate, the carbonaceous V-Toku2 at 62 / 63HRC and the SUS410 for the external lamination in order to guarantee a very high cutting capacity, penetration and sealing of the wire together with an ease of re-sharpening and maintenance; at the same time the blade has a remarkable resistance to corrosion and an important increase in resilience given by the laminated structure.
Use: EDC / Light Utility / All RoundType of production: Artisan
Production Lama: Italy
Blade: integral, laminated Japanese steel (San Mai) with V-Toku2 (carbonaceous) cutting edge at 62 / 63HRC and SUS410 (stainless steel) external scales
Blade treatment: Satin
Handle: Micarta
Blade length: 82mm.
Blade thickness: 6.8mm.
Total length: 200mm.
Balancing: set back
Weight: 229g.
Sheath: in Kydex, thermoformed, with belt loop
Packaging: certificate of authenticity
Notes: unique and exclusive pieceAs in the ancient Japanese Samurai swords.
The rolled steel - imported into Italy by Collini Steel directly from the Japanese Takefu Steel - is based on the ancient Japanese tradition in the creation of the famous Samurai swords. In fact, as early as 1100 the expert Japanese blacksmiths combined different materials together to give the Katana swords incredible cutting abilities combined with a resistance and flexibility previously unknown. It is thanks to this revolutionary construction technique that Samurai swords have been preserved to this day, becoming one of the most fascinating objects made by man. Following this tradition applied to modern metallurgy, today we are able to have technologically advanced steels already tested and used in cutlery also by famous brands such as Fallkniven, Cold Steel, Mcusta, Kai, Sog, Zwilling, Rockstead, etc.
Characteristics of San Mai steel: These are different types of metals bonded together to create a composite that encloses and intensifies the strengths of the metals individually taken:
- Longer tool life
thanks to the use of very high quality steels with high carbon content (VG10, CoS, Shiro) or sintered (SPG2), in the heart of the sheet (Core Steel), the blade, once hardened, achieves decidedly hardness and cutting performance higher than those achieved with the use of traditional steels.
- Greater resilience
built on the principle of Japanese swords, multilayer steel is difficult to break thanks to the toughness of the central steel (Core Steel) and the elasticity of the steel used for the side facing (Stainless Steel).- Better corrosion resistance
the steel used for the external layers (Stainless Steel) guarantees the blade a high resistance to corrosion. The combination of the two or more materials used by Takefu Steel generates, on a galvanic level, a structure that improves corrosion resistance even on the wire.- Easy processing even after heat treatment
although the steel normally becomes harder after hardening, the side steel used in multilayer processing does not lose its softness and allows easy processing, drilling or welding even after heat treatment. For an optimal performance of the blade, cryogenic treatment is recommended.- Improvement of the aesthetic result
The knives made with multi-state steel or with a damask pattern at the end of the processing are aesthetically elegant, refined and highly appreciated by collectors all over the world.For more information: collinisteel
WT-SC-VT -
Wander Tactical - Scrambler knife - SanMai V-Toku2 & Black Micarta - custom
In collaboration with Wander Tactical we have decided to offer their heavy duty, the Smilodon model, in an exclusive satin blade version that uses the famous Japanese San Mai steel produced by Takefu Steel.
This time, in the rich catalog of products offered by them, we chose a particular steel with a carbon cutting edge, but with external stainless steel cheeks. Specifically, for the central sheet we used the carbonaceous V-Toku2 at 62 / 63HRC and the SUS410 for external lamination in order to guarantee a very high cutting, penetration and sealing capacity of the wire together with an ease of regrinding and maintenance; at the same time the blade has a remarkable corrosion resistance and an important increase in resilience given by the laminated structure.
Use: EDC / Light Utility / All Round
Type of production: Artisan
Lama production: Italy
Blade: integral, in Japanese laminated steel (San Mai) with cutting edge in V-Toku2 (carbon) at 62 / 63HRC and external cheeks in SUS410 (stainless steel)
Blade treatment: Satin
Handle: Micarta
Blade length: 82mm.
Blade thickness: 6.8mm.
Total length: 200mm.
Balancing: backward
Weight: 215g.
Sheath: Kydex, thermoformed, with belt loop
Packaging: certificate of authenticity
Notes: unique and exclusive pieceWT-SC-VT2B -
Wander Tactical - Scrambler - Satin sanmai Cos & Brown Micarta - custom knife
In collaboration with "Wander Tactical" We decided to bring their EDC, the Scrambler model, in an exclusive satin-blade version that uses the famous Japanese Steel San Mai produced by Takefu Steel. Specifically, we used, for the central plate, the CoS to 61,5HRC (Cobalt Special, considered mechanically superior by 25% compared to the already much appreciated VG10) and 420J2 (56 HRC) for the two side plates in order to ensure high cutting capacity, but at the same time a remarkable resistance to abrasion, resilience and resistance to oxidation.
Occupation: EDC / Light Utility / All Round
Type of production: Custom
Country of production: Italy
Blade: Full, Japanese-rolled stainless steel (San Mai) with sharp CoS to 61,5HRC in cryogenic tempering
Blade treatment: Satin Raw
Handle: Micarta
Blade length: 82mm.
Blade thickness: 6.8mm.
Overall length: 200mm.
Balancing: backward
Weight: 215g.
Sheath: Kydex, compatible with tek-lok attacks (not supplied) or used as a neck knife
Packaging: -
Notes: Each knife is unique and handmade; may be slight of finishes, colors and material differences with respect to the photographed product.WT-T2-RMB -
Wander Tactical - Raptor - Satin CoS SanMai & Green Paracord - custom knife
In collaboration with Wander Tactical we decided to propose their new neck knife, the Raptor, in an exclusive satin-blade version that uses the famous SanMai japanese steel produced by Takefu Steel. For the central plate we have chose the CoS with 61,5HRC (Cobalt Special, considered mechanically superior by 25% compared to the already much appreciated VG10) and 420J2 with 56 HRC for the two side plates in order to ensure high cutting capacity but at the same time a remarkable resistance to abrasion, resilience and resistance to oxidation.
Use: Neck Knife / Collection
Type of production: handmade
Production Country: Italy
Blade: Full tang with japanese laminated (SanMai) 61.5HRC CoS stainless steel with cryogenic temper
Blade treatment: Satin
Handle: Paracord
Blade length: 80mm.
Blade thickness: 6.5mm.
Overall length: 175mm.
Balancing: backward
Weight: 156g.
Sheath: Kydex, thermoformed, for use with lanyard Neck Knife
Packaging: -
Notes: Each knife is unique and handmade; may be slight of finishes, colors and material differences with respect to the photographed product.WT-RP-SM -
Wander Tactical - Compound Scrambler - Raw Finish & Desert Micarta - craft knife
Use: EDC / Light Utility / All Round
Type of production: Artisan
Country of production: Italy
Blade: integral, in steel D2 at 59 / 61HRC
Blade treatment: Raw Finish and satin
Handle: Micarta
Blade length: 90mm.
Blade thickness: 6.5mm.
Total length: 203mm.
Balancing: set back
Weight: 230g.
Sheath: Kydex, thermoformed, compatible with tek-lok attachments (not supplied) or usable as neck knife
Package: -
Notes: This model is unique and handcraftedWT-SC-C -
Wander Tactical - Raptor - Satin CoS SanMai & Green Paracord - custom knife
In collaboration with Wander Tactical we decided to propose their new neck knife, the Raptor, in an exclusive satin-blade version that uses the famous SanMai japanese steel produced by Takefu Steel. For the central plate we have chose the CoS with 61,5HRC (Cobalt Special, considered mechanically superior by 25% compared to the already much appreciated VG10) and 420J2 with 56 HRC for the two side plates in order to ensure high cutting capacity but at the same time a remarkable resistance to abrasion, resilience and resistance to oxidation.
Use: Neck Knife / Collection
Type of production: handmade
Production Country: Italy
Blade: Full tang with japanese laminated (SanMai) 61.5HRC CoS stainless steel with cryogenic temper
Blade treatment: Satin
Handle: Paracord
Blade length: 80mm.
Blade thickness: 6.5mm.
Overall length: 175mm.
Balancing: backward
Weight: 156g.
Sheath: Kydex, thermoformed, for use with lanyard Neck Knife
Packaging: -
Notes: Each knife is unique and handmade; may be slight of finishes, colors and material differences with respect to the photographed product.WT-COS-RA-O -
Wander Tactical - Scrambler - Satin SanMai Cos & Gray Paracord - custom knife
In collaboration with "Wander Tactical" We decided to bring their EDC, the Scrambler model, in an exclusive satin-blade version that uses the famous Japanese Steel San Mai produced by Takefu Steel. Specifically, we used, for the central plate, the CoS to 61,5HRC (Cobalt Special, considered mechanically superior by 25% compared to the already much appreciated VG10) and 420J2 (56 HRC) for the two side plates in order to ensure high cutting capacity, but at the same time a remarkable resistance to abrasion, resilience and resistance to oxidation.
Occupation: EDC / Light Utility / All Round
Type of production: Custom
Country of production: Italy
Blade: Full, Japanese-rolled stainless steel (San Mai) with sharp CoS to 61,5HRC in cryogenic tempering
Blade treatment: Satin Raw
Handle: Paracord
Blade length: 82mm.
Blade thickness: 6.8mm.
Overall length: 200mm.
Balancing: backward
Weight: 215g.
Sheath: Kydex, compatible with tek-lok attacks (not supplied) or used as a neck knife
Packaging: -
Notes: Each knife is unique and handmade; may be slight of finishes, colors and material differences with respect to the photographed product.WT-SC-PA -
Wander Tactical - Scrambler - Satin SanMai Cos & Blue Micarta - craft knife
In collaboration with "Wander Tactical" We decided to bring their EDC, the Scrambler model, in an exclusive satin-blade version that uses the famous Japanese Steel San Mai produced by Takefu Steel. Specifically, we used, for the central plate, the CoS to 61,5HRC (Cobalt Special, considered mechanically superior by 25% compared to the already much appreciated VG10) and 420J2 (56 HRC) for the two side plates in order to ensure high cutting capacity, but at the same time a remarkable resistance to abrasion, resilience and resistance to oxidation.
Use: EDC / Light Utility / All Round
Type of production: Artisan
Lama production: Italy
Blade: integral, Japanese rolled stainless steel (San Mai) with 61.5HRC Crystalline-hardened CoS cutting edge
Lama treatment: Raw Satin
Handle: Paracord
Lam length: 90mm.
Blade thickness: 6.8mm.
Total length: 203mm.
Balancing: set back
Weight: 240g.
Sheath: Kydex, thermoformed, compatible with tek-lok attachments (not supplied) or usable as neck knife
Package: -
Notes: Each knife is unique and handcrafted; there may be slight differences in finishes, colors and materials compared to the photographed product.WT-SC-BL -
Wander Tactical - Raptor Bronze GunKote & Coyote Paracord - craft knife
Use: Neck Knife / Collection
Type of production: Artisan
Blade production: Italy
Blade: integral, D2 steel
Blade Treatment: Bronze GunKote
Manicure: Paracord
Blade Length: 80mm.
Blade thickness: 6.5mm.
Total Length: 175mm.
Balancing: backward
Weight: 156g.
Sheath: Kydex, thermoformed, with cord for use with Neck Knife
Packing: -
Notes: Each knife is unique and handcrafted; There may be differences in finishes, colors and materials compared to the photographed productWT-R-DP -
Wander Tactical - Scrambler - Raw Finish & Night Blue Micarta - custom knife
Occupation: EDC / Light Utility / All Round
Type of production: Handcrafted
Production Country: Italy
Blade: integral, steel D2 59 / 61HRC
Blade treatment: Raw Finish
Handle: Micarta
Blade length: 82mm.
Blade thickness: 6.5mm.
Overall length: 200mm.
Balancing: backward
Weight: 235g.
Sheath: Kydex, thermally compatible with tek-lok attacks (not supplied) or used as a neck knife
Packaging: -
Notes: Each knife is unique and handmade; may be slight differences of finishes, colors and materials from product photographed12654 -
Wander Tactical - Raptor - Satin CoS SanMai & Green Paracord - custom knife
In collaboration with Wander Tactical we decided to propose their new neck knife, the Raptor, in an exclusive satin-blade version that uses the famous SanMai japanese steel produced by Takefu Steel. For the central plate we have chose the CoS with 61,5HRC (Cobalt Special, considered mechanically superior by 25% compared to the already much appreciated VG10) and 420J2 with 56 HRC for the two side plates in order to ensure high cutting capacity but at the same time a remarkable resistance to abrasion, resilience and resistance to oxidation.
Use: Neck Knife / Collection
Type of production: handmade
Production Country: Italy
Blade: Full tang with japanese laminated (SanMai) 61.5HRC CoS stainless steel with cryogenic temper
Blade treatment: Satin
Handle: Paracord
Blade length: 80mm.
Blade thickness: 6.5mm.
Overall length: 175mm.
Balancing: backward
Weight: 156g.
Sheath: Kydex, thermoformed, for use with lanyard Neck Knife
Packaging: -
Notes: Each knife is unique and handmade; may be slight of finishes, colors and material differences with respect to the photographed product.WT-COS-RA-W -
Wander Tactical - Scrambler - Satin SanMai Cos & Woodland Paracord - custom knife
In collaboration with "Wander Tactical" We decided to bring their EDC, the Scrambler model, in an exclusive satin-blade version that uses the famous Japanese Steel San Mai produced by Takefu Steel. Specifically, we used, for the central plate, the CoS to 61,5HRC (Cobalt Special, considered mechanically superior by 25% compared to the already much appreciated VG10) and 420J2 (56 HRC) for the two side plates in order to ensure high cutting capacity, but at the same time a remarkable resistance to abrasion, resilience and resistance to oxidation.
Occupation: EDC / Light Utility / All Round
Type of production: Custom
Country of production: Italy
Blade: Full, Japanese-rolled stainless steel (San Mai) with sharp CoS to 61,5HRC in cryogenic tempering
Blade treatment: Satin Raw
Handle: Paracord
Blade length: 82mm.
Blade thickness: 6.8mm.
Overall length: 200mm.
Balancing: backward
Weight: 215g.
Sheath: Kydex, compatible with tek-lok attacks (not supplied) or used as a neck knife
Packaging: -
Notes: Each knife is unique and handmade; may be slight of finishes, colors and material differences with respect to the photographed product.COS-SC-W -
Wander Tactical - Scrambler - Satin SanMai Cos & OD Brown Paracord - custom knife
In collaboration with "Wander Tactical" We decided to bring their EDC, the Scrambler model, in an exclusive satin-blade version that uses the famous Japanese Steel San Mai produced by Takefu Steel. Specifically, we used, for the central plate, the CoS to 61,5HRC (Cobalt Special, considered mechanically superior by 25% compared to the already much appreciated VG10) and 420J2 (56 HRC) for the two side plates in order to ensure high cutting capacity, but at the same time a remarkable resistance to abrasion, resilience and resistance to oxidation.
Occupation: EDC / Light Utility / All Round
Type of production: Custom
Country of production: Italy
Blade: Full, Japanese-rolled stainless steel (San Mai) with sharp CoS to 61,5HRC in cryogenic tempering
Blade treatment: Satin Raw
Handle: Paracord
Blade length: 82mm.
Blade thickness: 6.8mm.
Overall length: 200mm.
Balancing: backward
Weight: 215g.
Sheath: Kydex, compatible with tek-lok attacks (not supplied) or used as a neck knife
Packaging: -
Notes: Each knife is unique and handmade; may be slight of finishes, colors and material differences with respect to the photographed product.COS-SC-G -
Wander Tactical - Scrambler - Satin sanmai Cos & Brown Micarta - custom knife
In collaboration with "Wander Tactical" We decided to bring their EDC, the Scrambler model, in an exclusive satin-blade version that uses the famous Japanese Steel San Mai produced by Takefu Steel. Specifically, we used, for the central plate, the CoS to 61,5HRC (Cobalt Special, considered mechanically superior by 25% compared to the already much appreciated VG10) and 420J2 (56 HRC) for the two side plates in order to ensure high cutting capacity, but at the same time a remarkable resistance to abrasion, resilience and resistance to oxidation.
Occupation: EDC / Light Utility / All Round
Type of production: Custom
Country of production: Italy
Blade: Full, Japanese-rolled stainless steel (San Mai) with sharp CoS to 61,5HRC in cryogenic tempering
Blade treatment: Satin Raw
Handle: Micarta
Blade length: 82mm.
Blade thickness: 6.8mm.
Overall length: 200mm.
Balancing: backward
Weight: 215g.
Sheath: Kydex, compatible with tek-lok attacks (not supplied) or used as a neck knife
Packaging: -
Notes: Each knife is unique and handmade; may be slight of finishes, colors and material differences with respect to the photographed product.COS-SC-B




















