Diablo DS0906CWS3 Reciprocating Saw Blade, 6/9 TPI, Carbide Cutting Edge, Perma-Shield | The next generation Diablo demo demon carbide-tipped reciprocating blades with new variable tooth design are specifically designed for maximum performance in nail-embedded wood. This high performance carbide-tipped blade delivers unmatched 50X longer cutting life than bi-metal blades in nail-embedded wood.