DURABLE QUALITY - Utility knives made from strong and durable ABS material and SK5 9MM 30 degree blade made with carbon steel that have excellent edge retention and toughness with ability to hold a sharp edge for all kinds of precision work. REPLACEABLE SHARP SNAP-OFF BLADE - Include 10 SK5 ( 30 degree Blade) with retractable box cutter. Each blade has a sharp segment. When you feel the blade edge become dull, easily snap off a section of the blade and get a sharp edge without replacing the blade. 30 degree blade perfect for crafts that helps to provide precision cutting. WIDELY USES - Retractable knife can be used for commercial or industrial applications like for cutting rope, vinyl wrap, paper, box opener, PVC, leather, Tap, cardboard, Carton, Plastic, mat board, foam board, delicate fabrics, wallpaper and art & craft project etc. LIGHTWEIGHT ERGONOMIC HANDLE - Cutter knife has comfortable ergonomic handles that provide a secure grip and reduce hand fatigue. Blade locking mechanism to keep the blade securely in place and prevent injury. Quality for Life: MulWark tools are built to last. If you encounter any issues with the materials or craftsmanship, simply return the product. Utility Knife and blades set