The Satre FX S600 Black is a fixed-blade knife designed for prolonged, practical field use. The skeletonized full-tang structure balances the weight well and delivers direct, controlled cutting performance; the build is intentionally simple, robust, and field-oriented. The blade is made of Böhler S600 steel (64HRC) with an EXP Dark finish and a flat grind. The knife is built to be used seriously, with a clear focus on reliability, edge performance, and operational durability.

The official technical sheet lists 106 g weight, 190 mm overall length, 95 mm blade length, and 5 mm blade thickness. The handle is also made of Böhler S600 steel (64HRC), which matches the knife’s monolithic, highly durable design. The knife comes with a pre-shaped black Kydex sheath.

Technical features

• Model: Satre FX S600 Black.
• Type: fixed-blade knife.
• Weight: 106 g.
• Overall length: 190 mm.
• Blade length: 95 mm.
• Blade thickness: 5 mm.
• Blade material: Böhler S600 steel (64HRC).
• Blade finish: EXP Dark.
• Blade grind: flat grind.
• Handle material: Böhler S600 steel (64HRC).
• Structure: skeletonized full-tang.
• Sheath: pre-shaped black Kydex sheath.
• Warranty: lifetime.

Package contents

• 1 Extrema Ratio Satre FX S600 Black.
• 1 pre-shaped black Kydex sheath.

How to use

• Use the knife for outdoor tasks, light bushcraft, field work, and prolonged use.
• Always keep it in the sheath after use.
• Keep blade and sheath clean and dry to preserve function and finish.

Safety warnings

• Do not tamper with or modify the product.
• Use carefully, especially when the blade is exposed.
• Keep out of reach of children.
• Always store the knife in the sheath after use.
• Use only for its intended purpose.
• Sales restricted to users 18+.

The Satre FX S600 Black is a very well-positioned premium fixed blade for users who want a compact but genuinely working tool with a clear technical identity.