Metal shielding gas soldering is similar to MAG welding. An endless wire electrode, the solder, is fed to the arc by a wire conveyor and melted under a shielding gas jacket. The shielding gases have different properties depending on their composition, and therefore different effects on the solder result. A correct choice of the parameters - current, voltage, wire feed - prevents melting of the surfaces of the components to be joined. A joint, similar to that created with flame soldering, is created.