Diablo's Bi-Metal Reciprocating Saw Blades for Nail-Embedded Wood are specifically designed for maximum performance and superior results in rough-in material 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. Perma-SHIELD® coating protects the blade from heat, gumming, and corrosion 1" demolition body for straighter cuts with less vibration Ultra hardened cutting edge for up to five times longer life than standard blades A one-of-a-kind tip design that enables faster and easier plunging