MIG - Metal Inert Gas
Uses a continuous wire electrode fed through a welding gun for a variety of metals, including steel, aluminum and stainless steel.
TIG - Tungsten Inert Gas
Uses a non-consumable tungsten electrode to produce the weld to join thin sections of stainless steel and non-ferrous metals such as aluminum, magnesium, and copper alloys.
MAG - Metal Active Gas
Uses a consumable wire electrode and an inert gas mixture as a shielding gas to join thicker sections of metal (typically steel) and is often used in the automotive and construction industries.