slice® proprietary manufacturing process creates a finger-friendly blade edge housed in a durable nylon-reinforced handle. Ceramic blades are rust-proof, non-sparking, non-magnetic and chemically inert. slice® donates 1% of sales to Autism research related charities. Knife Type: Utility; Blade Type: Double Sided; Replaceable; Blade Material: Zirconium Oxide; Number of Blades: 1.