Clauss SpeedPak Replacement Titanium Bonded Hook Blade Cartridges, 10pk: * Each cartridge holds 10 titanium bonded, double-edged hook blades * Blades resist corrosion and adhesives * 3x harder than steel and will stay sharper longer * Cartridges allow for quick, easy and safe blade changes * For use with the SpeedPak Knife #18038 * Includes 100 blades total * Green cartridge * Model# 18435