"Extrema Ratio Sethlans" is a fixed blade work knife designed to face a wide range of situations, suitable for survival, bushcraft, prepping, and also as a backup blade.
The Sethlans was designed in collaboration with Daniele Dal Canto, a Master Advanced instructor. The Sethlans is available in two versions with two different types of steel: a Stone Washed version using böhler N690 steel heat-treated at 58 HRC, chosen for its demonstrated reliability over the last 20 years due to its resistance to oxidation and durability of the blade edge, and a Black version that uses D2 steel, heat, and cryogenically treated at 60 HRC, which has high resharpening capacity even with makeshift tools.
To provide greater hardness and resistance, the blade is coated with the new Teflon-based product "EXP DARK," proposed by Extrema Ratio. The knife comes with G10 scales that feature the ergonomic design characteristic of Extrema Ratio handles. They can be removed by freeing the skeletonized structure of the knife, allowing maximum lightness with minimum thickness.
For lovers of extreme customization, the full-tang structure allows the handle to be covered with paracord. The sheat is composed of a very light and minimalist Kydex part, which can be disassembled and adapted to both left and right-handed users.
The addition of an optional belt clip allows both vertical and horizontal positioning of the knife, making the sheath much more versatile than the textile version. It is equipped with a mini pouch with MOLLE system containing a double-sided sharpening stone and a Firesteel for lighting fires.
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