Produce clean, smooth holes using this bi-metal self-feeding bit. With a high-speed steel cutting edge for durability and a chamfered edge for easy removal, you can complete your woodworking jobs in less time with minimal effort. This drill bit is 2 9/16 inches in diameter with a 1/2-inch shank, a two-inch pipe entrance, a 2 1/2-inch tubing entrance, and an overall length of seven inches. It features a replaceable lead screw and can be sharpened with a file.