Relentless Knives Straight Fillet Knife -Engineered for precision, control, and yield, the Relentless 10in Straight Fillet Knife with leather sheath is the go-to blade for navigating the delicate spine and rib bones of flat fish such as halibut and salmon. The long, narrow, and tapered profile allows for smooth, clean passes—minimizing waste and maximizing every fillet. Crafted from 100% aerospace-grade titanium and proudly made in the USA, this knife strikes the perfect balance between flexibility and strength—designed to perform flawlessly under pressure while resisting corrosion for years of reliable use. Perpetual Edge Technology NeverRust Titanium Blade 100% aerospace grade titanium blade SlickCut Anti- Friction Treatment Treated with SlickCut, an anti-friction boron nitride compound which enhances the lubricity of the cutting edge to reduce friction and improve cutting performance. True Grit Glass- Reinforced Handle The handle is made of a glass reinforced ABS but covered with the same gritty material used to create the non-slip surface found adjacent to swimming pools.