The Sethlans in an Outdoor key

The Sethlans Outdoor is a fixed blade knife designed for bushcraft, survival, prepping and extended outdoor use.

It is based on the Sethlans model, already appreciated as a bushcraft knife and survival knife, and is reinterpreted in the Outdoor configuration with functional solutions dedicated to field use.
It is a tool designed for repeated work on wood, ropes and natural materials, for field management and for all activities where control and resistance count more than aesthetics.

Compact in thickness, solid in structure, it is an outdoor fixed blade designed to work for long periods without requiring complex maintenance.

Blade and performance

The full tang structure guarantees rigidity and mechanical continuity: no discontinuities, no hidden weak points.
The blade maintains the functional geometry of the Sethlans, designed to offer control, cutting ability and structural resistance in bushcraft and survival activities.

The Outdoor stonewashed finish is chosen for heavy-duty use: less sensitive to marks, easier to maintain, more tolerant to dirt and moisture, consistent with a professional outdoor knife.

Grip and configuration

The handle with green G10 scales features the ergonomic Extrema Ratio design, offering a stable grip even with wet, dirty or tired hands.

As with other Sethlans models, the scales are removable: the skeleton structure allows for lightening and alternative configurations with paracord for those who want a functional customization of the handle.

The high-visibility orange paracord lanyard included in the Outdoor configuration adds a safety feature: quick retrieval of the tool when the terrain hides it.

Outdoor Sheath

The Sethlans S600 Outdoor comes with a lightweight, minimalist Kydex sheath, designed for continuous outdoor use:
It does not absorb water, does not retain humidity, does not require complex maintenance, configurable for right and left-handed people.

Compatible with optional attachment systems, it allows for different carrying modes on belts, equipment and modular platforms.

Transport configurations

The sheath system is modular and configurable based on equipment and outdoor scenario:

MOLLE ready – direct attachment via paracord to backpacks and modular systems
Clip – quick and discreet carrying on belt or pocket
Ulticlip – secure fastening even without a belt
Malice Clip – horizontal anchor on belts and waist belts
Belt Clip – horizontal and/or vertical carry on belts and waistbands
Underarm strap – concealed and balanced carry during dynamic activities


A compact platform, designed to adapt to durability, environment and usage style.

SETHLANS S600 OUTDOOR

Control. Endurance. Reliability.

This is why Extrema Ratio speaks of professional outdoor: because the reliability required is the same as for operational use.

Brand: Extrema Ratio
Blade finish: Stone Washed
Blade type: Smooth drop point
Blade material: Böhler S600 steel
HRC: 64
Handle material: G10
Total length: 224mm
Blade length: 107mm
Blade Thickness: Thinned from 6.3mm to 4mm for improved cutting capabilities
Weight 221g
Complete with Kydex sheath