Diablo's reciprocating saw blades are specifically designed for maximum performance in nail-embedded wood applications. These high performance blades feature bi-metal technology that delivers up to five times longer life of standard blades on the market. Diablo's patented variable tooth technology provides faster cuts with less vibration. Freud Diablo 9" Bi-Metal Recip Blade for Nail Embedded Wood (5-Pack) DS0912BW5