Ideal for HMD115, HMD150, and HMD130 magnetic drills, these Hougen RotaLoc Annular Cutters boast a 5/8" bayonet-style twist lock shank, enabling swift tool-free changeouts. Crafted from M42 high-speed steel or Carbide, they feature stack-cut geometry, allowing them to penetrate multiple plates in a single pass, ensuring exceptional durability.