Diablo DS0920BF5 Reciprocating Saw Blade, 20/24 TPI, Steel, Perma-Shield | Diablo's reciprocating saw blades are specifically designed for maximum performance in metal cutting applications. The blade's ultra hardened cutting edge delivers up to 5X 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.