Swann-Morton professional precision carbon steel scalpel blades constructed from high-quality carbon steel for an accurate fine edge and smooth cut. Perfect for cutting all types of mould rubber. Designed to fit into any standard scalpel handle for ease and convenience and each blade is marked with the size directly onto scalpel for easy identification. Also ideal for many other craft uses such as papercraft, cardcraft and scrapbooking. Cuts a variety of materials cleanly and efficiently