The Starrett A2E Quick Hitch arbor has exactly the same specification as our standard arbor range, except that the pilot drill is 13mm (1/2") longer, suitable for use with the extended cutting depth of our Fast Cut Multi Purpose Hole Saws (MPH). The set screw in the body allows for easy replacement of the pilot drill. Quick Hitch arbors permit instant change of hole saws without tools and without removing the arbor from the chuck.