... 5" LCD Touch Screen Marking Machine (set include: marking machine, 3.5" LCDcontroller, 2 marking pins) CNC Automatic 3.5" LCD Touch Screen Marking ... hardware part, Aeronautics, Electronics, war and light industry for marking steel, iron, copper, aluminum and plastic parts ... customers required.Free training installation and operation for the staffs. CNC Automatic 3.5" LCD Touch Screen Marking Machine