The Diablo Demo Demon Bi-Metal Reciprocating Blade are the most innovative blades on the market, delivering break-through 5x performance than standard blades. 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. Diablo Demo Demon 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. Diablos patented variable tooth technology provides faster cuts with less vibration. Perma-shield coating protects the blade from heat, gumming, and corrosion. 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.