Drill smooth, clean holes through hardwood, wet wood, or 4x4s with less time and effort using this bi-metal self-feed bit. Built with high-speed cutting steel with a chambered edge allows you to pull the bit cleanly while removing excess wood chips from your project. It features a replaceable lead screw and can be sharpened with a file. This drill bit has an overall length of seven inches, a one-inch diameter, a 1/2-inch shank, a 1/2-inch pipe entrance, and a 7/8-inch tubing entrance.