Hougen 12114 7/16" X 1" Rotabroach "12,000-Series" M2 High Speed Steel Magnetic Drill Annular CutterHougen Cutters drill a burr free hole by cutting around the hole and ejecting the center as a usable slug. Hougen Cutters require far less horsepower than twist drills of comparable size when run at the same feed rate. As a result, cutters can be run at higher feeds with higher metal removal rates while horsepower requirements are not increased. The geometry of Hougen Cutters is such that far less material is converted into chips than when using twist