RotaLoc Plus™ Annular Cutters are designed for the Hougen® HMD130 Low Profile Drill. They’re made of M42 high speed steel, feature Stack Cut geometry for penetrating multiple plates in a single pass and are designed for a full 1" D.O.C. They feature a 5/8" bayonet style shank mounting for fast change out, with no tools required to install in the drill spindle, and can be as easily removed. For optimum cutter tool life and cutter efficiency use Hougen® Slick-Stik™ Lubricant or RotaGel™ Cutting Lube