DeWalt Self-Feed Drill Bit 41mmDeWALT DT4580QZ 41mm Extreme Forstner Bit Fast, Clean Drilling in Wood The DeWALT DT4580QZ 41mm Extreme Forstner Drill Bit is built for high speed, clean hole making in hardwood, softwood, MDF, chipboard, and plasterboard. With its self feeding threaded tip and precision ground triple cutting edges, this bit is ideal for creating flat bottomed holes quickly and accurately. Whether you're fitting door hardware, drilling pipe access points, or working