Diablo's Demo Demon Starlock Bi-Metal Oscillating Blades feature application-specific designs that deliver maximum durability and longer life in nail-embedded wood. These high-performance blades feature an ultra-hardened cutting edge to deliver up to 5X longer life than standard blades. A curved contact edge creates a pilot for precise, clean plunge cuts with less vibration. Black I.C.E (Industrial Cooling Element) keeps the teeth cool and buildup free for fast, clean cuts. Tool free quick-change interface fits Fein and other Starlock tools; also compatible with most non-Starlock multi-tools.