Product details:

Hougen RotaLoc Carbide Cutters for the HMD115(Carbide Tip - Stack-Cut Geometry with 3/4" (19mm) Depth of Cut)For use exclusively in the HMD115 magnetic drill. They have a bayonet style twist lock shank for fast cutter changes without using tools. For optimum cutter tool life and cutter efficiency use Slick-Stik lubricant.