TIG welders, or Tungsten Inert Gas welders, are tools used for welding metals together. They use a non-consumable tungsten electrode to produce a strong and precise weld. The process involves shielding the weld area with an inert gas, usually argon, to protect it from contamination. This makes TIG welding ideal for thin materials and applications requiring high-quality finishes. TIG welding is versatile and can be used on various metals, including aluminum, stainless steel, and copper. It requires skill and practice, as the welder must control the heat and filler material simultaneously. This technique is commonly used in industries like automotive, aerospace, and fabrication.