Clauss SpeedPak Replacement Titanium Bonded Hook Blade Cartridge, 10pk: * Titanium Bonded blades are 3X harder than steel * Edges stay sharper longer * Blades resist corrosion and adhesives * Allows for quick, easy and safe blade changes * For use with Clauss SpeedPak Utility Knife (model# 18038) * Model# 18433