Diablo's Bi-Metal Reciprocating Saw Blades for Nail-Embedded Wood are specifically designed for maximum performance and superior results. These high-performance blades feature bi-metal technology that delivers up to 5X longer life compared to 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