Made of SK5 spring steel (.024 in.), TEKTON Utility Knife Blades are the perfect general-purpose blades for cutting paper, cardboard, plastic sheeting, vinyl, and drywall. The convenient, compact, one-at-a-time dispenser keeps blades organized and protected until you need them. These standard-duty, universal replacement blades fit most utility knives, so you can always have a sharp, new cutting edge at the ready.