... or non-metal material Applycation: It's applicable for the fields of automobile motorcycle parts, merchanism,petroleum, ... engines,mechanical parts,machine tools,metal pipe,gear,pump,valve,fastening pieces,cylinder and various hardware. Technical Pararmters ... adjustableMarking Dirctionup,down,left,right,circle Marking Characterssizes,spacing for adjustment,character size covers 2-80mm,even bigger Impact ...