The Slice^® 10518 craft knife blades work with our craft handles and scalpel handles to provide controlled, detailed cuts and a much safer finger-friendly^® cutting edge. Unlike standard metal or ceramic craft blades, these straight-edge, rounded-tip blades feature our proprietary safety grind. Moreover, they hold their edge up to 11 times longer than metal, do not require a sharps disposal box, and are recyclable. As with all Slice safety ceramics, these blades are non-sparking, non-magnetic, chemically inert, and never rust.