Diablo's 1-1/4" Starlock Carbide Oscillating Blades Feature Application Specific Designs That Deliver Extreme Durability And Superior Cutting Life In Metal Cutting. High-Performance Carbide Teeth Deliver An Unmatched Up To 50X Longer Cutting Life Versus Standard Bi-Metal Blades. An Optimized Blade And Tooth Design, Along With 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 Non-Starlock Multi-Tools.