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. Bi-metal blades stay sharp up to 3 x longer than carbon steel blades.Select Option Pack of 5Pack of 50 Add to Basket Quantity