Handheld Vehicle Chassis Pneumatic Vin Number Dot Peen Marking Machine Engraving Product name Electric dot pin marking machine Product model SW120-30 Marking area 120*30 mm（Planar work area） Marking speed 10-40 mm/s Mpact frequency 30 times/s Repeated accuracy 0.1 mm Marking depth 0.1~2 mm(According to materials) Operating temperature -5 to 40 ℃ Power supply DC 21V Applicable material Metal, hard plastic, below HRC 60 Marking content Characters, number, graphic, logo, barcode,