... in either sheet or tubular forms.Suitable for all types of mag drill e.g. Nitto, Hougen, Alfra, ... S.S, cobalt steel. TiAIN coating availableideal for drilling structural steel and metalspecial designed double-action ... friction resistanceHandle for fast interface.Apply to Nitto, Alfra, BDS, Ruko, drilling rig and other magnetic drill machine. ... also have Pilot Pin Annular Cutter for magnetic drill machine