... , VIN code, serial numbers, date and graphics) on metal or no-metal work pieces permanently. Dot Peen Marker Applicable Materials & Fields : ... on large-sized and unmovable metal items and some hard nonmetallic work pieces. It can also work with pipelining. Due to ... rods, petrol pipe, crossbeam, mechanical parts, machine tools, metal pipes, pump bodies, fastening pieces and various hard plastic products ...