The only utility knife we use now. The pre-loaded cartridge makes blade handling faster than any other utility knife. With 10 pre-loaded blades it means you always have a fresh blade ready. Tough titanium bonded blades last longer because they are 3 times stronger than ordinary steel blades. Just snap in a pre-loaded blade cartridge, push to load a blade and you are ready to go. When that blade's edge is dull just push the multipurpose button, rotate and replace the blade to use the other edge.