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Extrema Ratio Sethlans Expeditions (N690, DARK STONE Finish)
Description
Extrema Ratio Sethlans Expeditions (N690, DARK STONE Finish)
The Sethlans Expeditions is part of Extrema Ratio’s new Expedition Series, dedicated to professional explorers and anyone needing a high-performance survival knife. Developed in collaboration with Master Advanced Instructor Daniele Dal Canto, it’s designed to tackle a broad range of tasks—from backup blade usage to demanding bushcraft scenarios. With its ergonomic G10 desert handles and a skeletonized full-tang structure, Sethlans Expeditions delivers both reliability and customizability in the field.
Key Features
- BÖHLER N690 Steel (58 HRC): Offers excellent edge retention and corrosion resistance; has a DARK STONE finish achieved through MIL-C-13924 burnishing plus a superficial stone wash.
- Ergonomic G10 Desert Scales: Removable for a paracord wrap on the skeletonized tang, maximizing lightness and versatility.
- Thinned Blade Profile: Reduced from 6.3 mm (0.25 in) down to 4 mm (0.15 in) for enhanced cutting performance without sacrificing strength.
- Modular Kydex® Sheath:
- Minimalist, lightweight design
- Can be adapted for both left and right-handed users
- Optional belt clip for vertical or horizontal carry
- Includes a mini pouch (M.O.L.L.E.-compatible) with paracord (flammable filament) and a Firesteel for starting fires
- Expedition Series Credentials: Built to the same standards as Extrema Ratio’s military-grade tools but optimized for explorers, survivalists, and outdoor professionals.
Technical Specifications
| Property | Details |
|---|---|
| Weight | 207 g (7.30 oz) |
| Blade Length | 107 mm (4.21 in) |
| Total Length | 224 mm (8.82 in) |
| Blade Thickness | Thinned from 6.3 mm (0.25 in) to 4 mm (0.15 in) for improved cutting ability |
| Blade Material | Böhler N690 (HRC ~58) |
| Blade Finish | DARK STONE (MIL-C-13924 burnishing + superficial stone wash) |
| Main Grind | Flat |
| Handle Material | G10 (desert color) |
About Extrema Ratio
Extrema Ratio specializes in the development and production of professional knives for military, public security, and rescue use. Their catalog spans military, tactical, and hunting models, as well as durable survival knives built to withstand the harshest conditions. With advanced manufacturing techniques and premium materials, Extrema Ratio delivers high-end performance tools recognized worldwide for their functionality, consistency, and longevity.
Manufacturer Information
Extrema Ratio S.R.L.
Via Traversa delle Ripalte, 72/78
59100 Prato (PO), Italy
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Website: Contact Page