We manufacture annular cutters /Magnetic drillwith CNC machines and we have many cutters of different sizes in stock.Magnetic drill(Mag drill)Weldon shank & one touch shank annular cutters,M2,M35,M42 material,size from12mm-100mm,depth25mm,30mm35mm,,50mm,55mm,75mmCan drill iron sheet ,stainless steel,etc. Abrasion resistance,the cutters have long life .Tin coated ,TIALNDetailed Selling Lead Description 1.cutter Dia(mm):12mm...........100mm2.Max.drilling depth:30mm/55mm/110mm3.Tin coated is also OK.4.Type:WBS/WBR/WBL