Irwin 10505823 Snub Nose Bi-Metal Safety Knife Blades x5 Pcs Irwin Snub Nose Bi-Metal Safety Knife Blades. The snub nose blade design helps to reduce the risk of accidental puncture wounds. Shatterproof bi-metal blades combine the best of 2 metals, electro-welded together for superior performance and safety. FEATURES Bi-metal blades stay sharp up to 3x longer than carbon steel blades Snub nose blade design helps to reduce the risk of accidental puncture wounds Spring steel allows the blade to bend without accidentally breaking Two-notch blade design fits most utility knives SPECIFICATION Quantity: 5