Hougen® RotaLoc Annular Cutters are ideally designed for HMD115, HMD150 and HMD130 magnetic drills. It features a 5/8" bayonet style twist lock shank for fast change out without requirement of any other tools to install in the drill arbor. It is constructed from M42 high-speed steel or Carbide Cutters with stack-cut geometry for penetrating multiple plates in a single pass and renders magnificent durability.