Ideal for precision drilling jobs on wet wood, hardwood or 4x4s, this bi-metal self-feeding bit is designed with a high-speed steel cutting edge and a chamfered edge. This durable drill bit cuts smooth, clean holes with less time and effort, even on nail-embedded wood and other tough materials. It features a replaceable lead screw and can be sharpened with a file. It measures seven inches in overall length, 2 1/8 inches in diameter with a shank size of 1/2 inches, and a two-inch tubing entrance.