A welding torch is a tool used to join materials, typically metals, by melting them together. It produces a high-temperature flame, which can be fueled by gases like acetylene or propane. The torch is equipped with a nozzle that directs the flame precisely where it is needed, allowing for accurate and efficient welding. Welding torches come in various types, including oxy-acetylene torches and MIG (Metal Inert Gas) torches. Each type serves different welding processes and materials. Proper use of a welding torch requires safety precautions, such as wearing protective gear to shield against heat and sparks.