... made with steel material, after heat treatment and cnc machining process. It is used as a part of oil ... parts, nonstandard parts, including screw processing, grinding, pricision machining, cnc turning, punching & etc, as per buyers' drawing & requirements ... :0086-411-82778368Product range: casting, CNC machining, CNC boring and milling machine, and CNC surface grinding machineMaterial:steel, iron, brass ...