Use this bi-metal self-feeding bit on wet wood, hardwood, and 4x4s. Made with a chamfered, high-speed steel cutting edge, this bit produces smooth, clean holes with the strength to cut through nail embedded wood. This drill bit has a replaceable lead screw and can be sharpened by file. It has an overall length of seven inches with a diameter of 1 3/4 inches, a 1/2-inch shank, a 1 1/4-inch pipe entrance, and a 1 1/2-inch tubing entrance.