Drill smooth, clean holes through hardwood, wet wood, or 4x4s with less time and effort using this bi-metal self-feeding bit. Built with high-speed cutting steel with a chamfered edge allowing 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 2 1/4-inch diameter, a 1/2-inch shank, and a 2 1/8-inch tubing entrance.