Neiko 00512A Utility Hook Blades with Wall-Mountable Dispenser, 100 Count | SK5 Steel Electrician hook blades made with professional grade SK5 steel to increase blade toughness and provide superior edge holding ability Dispenser provides safer and more secure access to hook knife blades; holds 100 hook style utility knife blades Cuts and trims roofing materials, linoleum, carpet, fabric, cartons and sheet metal; Blade shape prevents damage to surfaces below Convenient dispenser is molded with mounts to securely install on a wall for quick and easy access Blade specs: 6mm blade thickness, 1-15/16" blade length; Blades fit most standard utility knives