RELIABLE & DURABLE. Retractable snap-off utility knife is sturdy and strong as it has stainless steel blades of high quality and ergonomic handle. Cut sharp and rust resistance. COMFORTABLE GRIP. Professional box knives feature contoured handles to ensure strength, comfort, and maximum productivity. Suitable for office, school, warehouse, shipping, home improvement, hobby LOCKING MECHANISM. Furnished with one 18 mm knife blade. Prevent blade slipping with the safety lock tab. Always keep your blade fresh and sharp by snapping off the blade for a new sharp cutting tip MULTIUSE. Cutting moving boxes, carton, carpet, leather, cardboard, rubber, fabric, wallpapers, paper, tape, plastic, foam board, DIY, art and craft projects, and more. EFFICIENCY. 13-position slide exposes variable cutters length. Easy load the next razor, always working with the sharpest edge. Compatible with 18mm refills blade.