Milwaukee 49-56-7135 Starter Bit, 5/8-18 Thread, 1/4 in Shank, 3/8 in Dia Bit, Hex Shank

The Milwaukee Diamond Max arbor with retractable starter bit creates a divot in the material to provide accurate centering in less time when cutting porcelain, tile and stone. You'll cut faster and more accurate holes with a clean finish when you use the retractable starter bit with Diamond Max threaded hole saws. Diamond Max hole saws deliver the excellent in class performance and the lowest cost per hole on-the market with up to 20X longer life. No pilot hole drilling is required, saving you time and eliminating the risk of damaging your material when drilling a pilot hole. Use it with Diamond Max threaded hole saws to increase your productivity when cutting all porcelain, tile and stone materials. Large Arbor fits hole saws 1-1/4 and larger.