The Morse M45P A2 Arbor is designed for use with hole saws ranging from 32mm to 152mm in diameter. It features a quick release 7/16" hex shank for easy tool changes and comes with a high-speed steel (HSS) pilot drill. Size Range : Suits hole saws with diameters from 32mm to 152mm Shank Type : 7/16" Quick Release Hex Shank Included : Supplied with HSS pilot drill Features : Quick release mechanism for rapid changes Compatible with a wide range of hole saw sizes Brand : Morse