Diablo's high performance reciprocating saw blades feature bi-metal technology that delivers up to five times longer life of standard blades on the market. These blades are specifically designed for maximum performance in general purpose (nail-embedded wood, metal and plastic) applications. The unique feature combination of Ultra-Hardened Bi-Metal teeth, friction-reducing coating, and high performance Variable Tooth Design provides users with never-seen-before performance and ease of use.