Diablo Steel Demon reciprocating saw blades are specifically designed for maximum performance in metal demolition applications. The blade’s ultra hardened cutting edge delivers up to five times longer life than those of standard blades. Dual Tooth design features a double tooth configuration with small gullets for faster material removal and extra durability. Diablo STEEL DEMON® Bi-Metal Reciprocating Blades deliver 5x the performance of standard blades. The ultra hardened edge is created through a unique heat treatment process that optimizes the bi-metal teeth durability