Diablo's Bi-Metal Reciprocating Saw Blades for General Purpose Cuts are specifically designed for maximum performance in wood, nail-embedded wood and metal applications. 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