Hougen 11140 RotaCut 7/8-Inch Cutter with 1/2-20 Threaded Hole has a maximum depth of cut of 1/2-inch. RotaCut Sheet Metal Hole Cutters make holemaking faster and easier with conventional twist drills and holes saws for sheet metal, plate materials and plastics up to 1/2-inch thick. RotaCut cutters are precision-ground and produce clean, burr-free, round holes without deforming the surrounding material. For use in hand held drills with either a 3/8-inch or 1/2-inch chuck, and in air feed drill spindles for production work. These cutters last 10x longer and cut 3xfaster than twist drills or hole saws. Decimal equivalent of .8750.