100V/15A household power supply for semi-automatic welding Lightweight and easy to carry around at 12.1 lbs (5.5 kg), you can weld without shielding gas by using a special non-gas wire. (Non-gas welding only) Can be welded up to 0.2 inch (5.0 mm) thick with iron, and welded with stainless steel to 0.1 inch (3.0 mm) thick. (Uses stainless steel wire for non-gass) In addition to being able to easily start welding, it is also useful for small welding jobs by semi-professional and professionals.