... sheet or tubular forms.Suitable for all types of mag drill e.g. Nitto, Hougen, Alfra, Rotabroach, and BDS, etc.WANSUI ... to Nitto, Alfra, BDS, Ruko, drilling rig and other magnetic drill machine.Also applies to all types of vertical drilling machine ... , etc.We also have Pilot Pin Annular Cutter for magnetic drill machine