Ceramic replacement blades, chisel blade (set of 4). The Slice 10534 chisel blades combine our finger-friendly edge with extremely durable zirconium oxide. This results in a stable, precise, and safe blade that is perfect for detailed scraping and scratching tasks. These blades are compatible with most Slice craft knives and scalpel handles. They are chemically inert, autoclavable, and non-conductive, making them an ideal choice for electronics manufacturers or laboratory personnel. As with all Slice safety blades made of ceramic, you won't injure yourself upon contact. Additionally, they last up to 11 times longer than comparable metal blades.