"DESCRIPTION FEATURES: Heavy duty cutting High Speed Steel cutting edge stays sharper longer 3X longer life than standard carbon blades Shatterproof spring steel body allows blade to bend and flex The IRWIN Bi-Metal Utility Blades feature a shatterproof spring steel body that allows the blade to bend and flex. It's high speed steel cutting edge provides a clean, sharp cut and stays sharper for longer. Ideal for heavy duty cutting applications. Comes in an IRWIN dispenser. TECHNICAL DATA: Package Dimensions: Width: 69.85mm Height: 146mm Length: 25mm Colour: Silver/Blue Model Name: Irwin Bi-Metal Utility Blades 20 Pack with Dispenser Model Number: 2084200 Material: Bi-Metal/Steel Retractable Blade (Yes/No): No Blade Storage (Yes/No): Yes Can Be Sharpened (Yes/No): No Lockable Blade (Yes/No): No REVIEWS"