RELIABLE & DURABLE. Retractable snap-off utility knife is sturdy and strong as it has stainless steel blades of high quality and ergonomic handle. Cuts sharp and rust resistant to be long lasting. JUMBO & MINI SIZE. Two size cutters ready for all your cutting and trimming needs. Cutting moving boxes, carton, carpet, leather, cardboard, rubber, fabric, paper, tape, foam board, DIY projects, and more. COMFORTABLE GRIP. Professional box knives feature contoured grip handles to ensure strength, comfort, and maximum productivity. Suitable for office, school, warehouse, shipping, home improvement, hobby. LOCKING MECHANISM. Furnished with a 9 mm and 18 mm wide 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 sharper cutting tip. EFFICIENCY. 13-position slide exposes variable cutters length. Easy load the next razor, always working with the sharpest edge. Compatible with 18mm refills blade.