Features and Benefits:�Improve accuracy: Hard carbide retractable bit securely marks hole center�Increase productivity: no pilot hole required�Versatile: Fits standard hole saw arborsThe Milwaukee® retractable starter bit provides accurate centering in less time when cutting tile, stone and glass. You�ll cut clean, accurate holes faster when you use the retractable starter bit with Diamond Plus™ threaded hole saws. Diamond Plus™ hole saws deliver the best-in-class performance and the lowest cost per hole on the market with up to 10X longer life. With the highly durable retractable starter bit, no pilot holes are required. Its 1/4 in. size fits standard hole saw arbors. Use it with Diamond Plus™ threaded hole saws to increase your productivity when cutting hard, abrasive materials.