Metabo HM pilot drill- For use with diamond socket countersinks (M16 female thread) in combination with one of the following arbors: 627043000, 627042000, 625224000, and 627041000"cannot be used with Quick arbors 627037000, 627038000, and 627039000
627038000 and 627039000 For use with diamond core bits for recessing electrical outlet boxes (M16 female thread) with one of the following arbors: 627043000