... 100mmDOP 25,50,75,100mmM2 &M35 materialcoating availableThe hss annular cutter has specifications of Φ12-100mm and 30, 50 ... types of mag drill e.g. Nitto, Hougen, Alfra, Rotabroach, and BDS, etc.WANSUI® annular cutters made ... BDS, Ruko, drilling rig and other magnetic drill machine.Also applies to all types of vertical drilling ... , etc.We also have Pilot Pin Annular Cutter for magnetic drill machine