... -100mmDOP 25,50,75,100mmM2 &M35 materialcoating availableThe hss annular cutter has specifications of Φ12-100mm and 30, 50, 75 ... H.S.S, cobalt steel. TiAIN coating availableideal for drilling structural steel and metalspecial designed double-action tooth ... vertical drilling machine, radial drilling machine, milling machine, lathe, etc.We also have Pilot Pin Annular Cutter for magnetic drill machine