... .marking machine on flat surface, marking letters on metals dot by dot, marking machine easy to move,marking machine with magnet ... )InstructionNCQ/C-120-60120*60With rubber plate, marking on big and heavy work piecesNCQ/C-150-80150*80NCQ/C2-120 ... manufactural date, name, brand, etc.on pillar, engine and other big and heavy materialsMajor partsMain machine, marking controller, English marking software