Enjoy up to 3 times the cutting power and 15 times the life of standard carbon steel blades with Stanley's 24TPI Bi-Metal Hacksaw Blades. They feature Bi-metal construction, which provides greater impact resistance for precision cutting and added durability for frequent use Cut it right the first time with bi-metal blades that are 15x sharper than standard carbon steel blades, while offering up to 3x longer life. These hard-to-find blades cut even the toughest materials with precision and ease.