... 25,50,75,100mmM2 &M35 materialcoating availableThe hss annular cutter has specifications of Φ12-100mm and 30, 50 ... , 75, or 100mm DOC. apply to steel, cast iron, copper, aluminum, and FRP in ... hardened H.S.S, cobalt steel. TiAIN coating availableideal for drilling structural steel and metalspecial designed double-action tooth ... etc.We also have Pilot Pin Annular Cutter for magnetic drill machine