The Weldmark MIG25-140 is a portable DC inverter wire feed welder capable of welding with solid wire (with shielding gas) or with flux core wire. It comes ready to accept the optional spool gun for welding aluminum. One of its many advantages of inverter technology is creating more welding power from a smaller transformer resulting in a much lighter unit. This Weldmark MIG25-140 is capable of MIG welding 3/16" steel in a single pass. It uses leading edge inverter technology to provide high quality welds that are crisp, clean and consistent with plenty of power that will impress the most experienced of welders. Typical applications include: home/hobbyist, construction, auto repair, farm and ranch and light industrial applications.