... 4.tolerance:+-0.01 Equipmentplaner type milling machine ,cnc milling machine ,milling machine ,drilling machine ,tapping ... machine and so on .(details show in below sheet)Material aluminum, mild steel, stainless steel, chrome steel ... better) or samples. Processing MethodTurning, Stamping, Die/pressure casting, CNC processsing, Punching, Riveting, Bending, Cutting, Welding, Threading, Grinding ...