The TIG AC/DC 501 Pulse is a powerful and intelligent welding machine. This unit is capable of either AC or DC TIG welding (stainless steel, mild steel or aluminum) or Stick welding. The TIG AC/DC 501 Pulse has advanced TIG welding parameters that allow the user to fine-tune the TIG welding process to meet a variety of applications. This combination of a high duty cycle and an easy to use interface, make it the perfect choice for production TIG welders who demand the best all day every day.