MIG welders, or Metal Inert Gas welders, are tools used for welding metals together. They work by feeding a continuous wire electrode through a welding gun, which melts the wire and fuses it to the base metal. This process is often favored for its speed and ease of use, making it suitable for both beginners and experienced welders. MIG welding is commonly used in various industries, including automotive and construction, due to its versatility. The process requires a shielding gas, typically argon or carbon dioxide, to protect the weld from contamination. This makes MIG welding effective for a wide range of materials, including steel and aluminum.