Diablo DS0614BF5 Reciprocating Saw Blade, 14/18 TPI, Steel, Perma-Shield | Diablo's Next generation reciprocating saw blades with full contact arched design are specifically designed for maximum performance in metal cutting applications. The blade's full contact arched design with ultra-hardened cutting edge provides faster cuts in fewer passes resulting in less heat build-up to deliver 5X longer cutting performance than those of standard blades.