"DESCRIPTION FEATURES: These utility knife blades have a welded, bi-metal design for a sharp edge and flexible body Stays sharper than traditional utility blades A shatter-resistant design adds safety Fits IRWIN utility knife handles and most other utility knives These blades have excellent flexibility and are virtually unbreakable under normal working conditions. These utility knife blades have a welded, bi-metal design for a sharp edge and flexible body Stays sharper than traditional utility blades A shatter-resistant design adds safety Fits IRWIN utility knife handles and most other utility knives Pack of 50 blades TECHNICAL DATA: Manufacturer: IRWIN Part Number: 2084300 Item Weight: 8.5 ounces Product Dimensions: 7.9 x 4.2 x 1.6 inches Size: 50pk Color: Blue Style: Bi-Metal Material: Metal Item Package Quantity: 50 Handle Material: Metal Batteries Included? No Batteries Required? No REVIEWS"