Diablo, 25 Pack, 6'' x 8-14TPI, General Purpose Demo Demon Reciprocating Saw Blades, Specifically Designed For Maximum Performance In General Purpose, Nail Embedded Wood & Metal Applications, High Performance Blades Feature Bi-Metal Technology That Delivers Up To 4x Longer Life Of Standard Blades, Patented Variable Tooth Technology Provides Faster Cuts With Less Vibration.