Lenox Arbor 1 L - 1/2" | Model : 085-14-1L Features :  Hardened carbon steel for strength Split point pilot drill for faster penetration and less walking Specifications :  Model : 1L  Fit Hole Saws : 9L - 19L Size :  9/16-1-3/16 14 - 30 mm Shank Type : Hollow Hex Shank Size :  1/2"& larger 12.7 mm & larger Primary Features : Adjustable pilot bit