Diablo, 3-1/2" Starlock bi-metal oscillating blade for general purpose cuts. Diablo's Starlock bi-metal oscillating blades feature application specific designs that deliver maximum durability and longer life in general purpose cuts: nail-embedded wood, clean wood, metal and plastics. These high-performance blades feature an ultra-hardened cutting edge to deliver up to 5 times longer life than standard blades. Curve 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 build up free for fast, clean cuts. tool free quick-change interface fits Fein and other Starlock Tools, also compatible with most Non-Starlock multi-tools.