It looks like it could repair commutators or field windings like on electric motors, or solder solid copper wires. I saw someone use one similar to that (but bigger) to repair a Lincoln engine drive generator/welder commutator and exciter ring with it. The iron was probably as old as the generator. They don’t make things like they used to.
The X-Tronic solder iron station is a good soldering station for those who experience back pain during soldering work. Such can be the case when it comes to the small circuit board projects that require close concentration.