... 100mm DOC. apply to steel, cast iron, copper, aluminum, and FRP in either sheet or tubular forms ... .Suitable for all types of mag drill e.g. Nitto, Hougen, Alfra, Rotabroach, and BDS, etc ... removal and friction resistanceHandle for fast interface.Apply to Nitto, Alfra, BDS, Ruko, drilling ... radial drilling machine, milling machine, lathe, etc.We also have Pilot Pin Annular Cutter ...