The Irwin 2084300 is a pack of 50 Bi-Metal Blue Blade Utility Blades. These Blue Blades are revolutionary unbreakable utility blades. Its bi-metal technology sets new standards of performance, by providing an unbreakable blade that stays sharp three times longer than the next best utility blade. Features: * Features patented Bi-Metal technology that sets new standards of performance * Spring steel body delivers superior flexibility to prevent breaking (*under normal working conditions) * High speed steel cutting edge stays sharp longer than traditional carbon utility blades (*tested on 20lb recycled paper) * Fits most utility knives What"s In the Box: * Irwin 2084300 Bi-Metal Utility Blades 50-Pack