Multifunctional TIG/MMA/CUT 3 in 1, easy to operate, portable, durable Inverter DC TIG/MMA/ ... -function welders are made with advanced inverter technology3.Three functions in one: TIG/MMA/CUT4.High frequency(as high as 100HZ ... , turn into strong plasma ARC9.CT312/416 is wildly used in welding and cutting steel, such as stainless steel, alloy Steel ...