Irwin Bi-Metal Blue Blades use patented bi-metal technology to deliver long-lasting, break-resistant cutting performance. A flexible spring steel body resists snapping while a high speed steel cutting edge holds its sharp edge far longer than traditional carbon blades. These standard-size blades fit most utility knives.

• 20 bi-metal utility blades per pack
• Patented bi-metal construction for durability and performance
• Spring steel body flexes to resist breaking under normal use
• High speed steel edge stays sharp longer than carbon blades
• Standard size fits most Irwin and other utility knives