DoubleHard’s original blade material is manufactured from high-alloy steel and is designed for portable and industrial sawmills. With induction hardened teeth, DoubleHard blades deliver twice the toughness and twice the sharp life compared to standard carbon blades. Wood-Mizer DoubleHard thin-kerf bandsaw sawmill blade - 180'' x 0.055'' x 1.25'' - 4° - DoubleHard is a durable, all-purpose blade for sawing softwoods, hardwoods, knotty woods, and frozen woods.