Relentless Knives Fillet Knife Curved 7" RKN7TCRVF. 02cm) overall. 7" (17.78cm) titanium curved blade. Black and green textured GRN handle. Perpetual Edge technology. Each knife is made of aerospace grade titanium and features a hard carbide and crushed diamond power strip creating a perpetual edge knife that sharpens as it cuts. True Grit handle. Gray leather belt sheath. Boxed with hanging tab. Specifications for Relentless Knives Fillet Knife Curved 7: Manufacturer: Relentless Knives Blade Length: 17.8 in 7 in Overall Length: 33 in 13 in Package Contents: Relentless Knives Fillet Knife Curved