In fact, the more dominant technology for direct part marking (DPM) is the use of lasers, especially for smaller metal parts and other non-metallic materials such as screws, PVC pipe, wire, glass, etc. In addition, laser marking can be used to create easy-to-read warning labels. In addition, laser marking can be used to create easy-to-read signs for electrical systems, escape route lights, etc.Quiet: laser marking of metal also generates noise especially deep engraving, but this is negligible compared to the peen marking process;Accuracy: Laser marking can mark metal in extremely small size, such as 2*2mm square UDI code or 0.03mm line width characters, which are impossible for peen marking;Visibility: Using MOPA fiber or UV laser for laser annealing instead of engraving for black or other color marking on metal workpiece with high contrast.