Home Carl Kammerling Brands C.K Tools Arbor for 14-30mm Holesaws Holesaw Arbor Arbor for 14-30mm Holesaw For use with holesaws up to 30mm.Supplied with replaceable 1/4" HSS pilot drill. Item No.Title 424037 Arbor 8mm Shaft 14-30mm 8mm (5/16'') 10 424038 Arbor 11mm Shaft 14-30mm 11mm (7/16") 10