The 250 AMP AC/DC TIG Welder is a powerful and versatile machine designed for welding both steel and aluminum. With its ability to switch between AC (Alternating Current) and DC (Direct Current) modes, it can efficiently handle a wide range of materials. The AC mode is ideal for aluminum and other non-ferrous metals, ensuring clean, high-quality welds, while the DC mode is suitable for ferrous metals like steel and stainless steel. This welder typically features adjustable settings for current, pulse, and frequency, allowing for precise control over the welding process. It's a great option for both professional welders and serious hobbyists who require a reliable and flexible welding solution.