Relentless Knives 6" Straight Fillet Knife

Designed for professionals who demand uncompromising performance, the Relentless 6-Inch Straight Fillet Knife delivers surgical-level control in a streamlined, field-ready form. The blade is 100% aerospace-grade titanium which won’t rust—engineered with our patented Perpetual Edge Technology to maintain a sharp edge through extended use in marine and field environments.

The straight-edge profile provides maximum contact and directional accuracy along the spine and rib cage, making it ideal for detailed fish filleting, meat breakdown, and fine trimming. Dialed-in flex strikes the perfect balance between rigidity and yield—ensuring clean passes even on delicate species.

The handle features our “True Grit” textured finish with contour indexing for unsurpassed blade control and grip security in wet or gloved conditions. Each knife is hand-assembled, finished, and quality-checked in the USA.