Lincoln Electric Pro MIG 140-Amp Welder K2480-1 30-140 amp welding output range is enough for many tasks Weld up to 5/16 steel using self-shielded Lincoln Innershield wires Precision full adjustment drive system reduces chance of wire tangling and crushing Brass-to-Brass gun connections for enhanced connectivity No hassle tool-less design; for wire spool mounting, wire drive service and polarity changes Innovative contact tip, drive roll and n