Milwaukee SAWZALL® Metal: Thin Kerf Blades have improved tooth geometry that provides the best possible speed and double the lifetime. The slim (0.90mm) blade body allows for maximum speed and flexibility. The bi-metal cutting teeth have 8% cobalt giving the ultimate in performance and lifetime. These blades have a TOUGH NECK™; stamped indentations around the reception strengthen the blade at its weakest point. A GRID IRON™ pattern is built into the blade to make it more rigid with less tendency to bend or buckle for best durability and straight cuts. 1/2in universal shank reception. Suitable for use with the following brands: AEG, B&D, Bosch, DeWalt, Fein, Flex, Hilti, Makita, Metabo, Milwaukee, Porter-Cable, Ridgid, Rothenberger, Ryobi, and Skil.