UTILITY BLADE REPLACEMENT|100 PACK DISPENSER|Lenox’s Edge blades are the only bi-metal utility knife blades available, with up to three times the life of carbon steel blades. They’re great for drywall, metal scoring and all regular use, and fit in standard utility knives. Exclusive features include an electron beam weld to protect against tip stripping, shatter-resistant spring steel backing and an M2 hardened steel material for edge durability.