New Slice® utility knives and cutters feature ceramic blades for long-lasting, harder, sharper and safer tools. Non-conductive, non-magnetic, chemically inert Zirconium Oxide is the most durable material in the world, next to diamonds. Thicker blades with rounded edges are safer to handle and use, yet still cut a variety of materials quickly and easily. Oil-free finish is ideal for clean rooms. Fewer blade changes needed means fewer injuries, and lower costs – save money and your fingers! Ambidextrous utility knives feature durable glass-filled nylon handles and easy, no-tool blade change. Smart blade automatically retracts even if finger is still on slider button. Uses either 10526 rounded or 10528 pointed replacement blades.