Small cordless soldering irons are available for fine electronics work. Some are not self-heated but are designed to be heated in a furnace with the advantage of being cordless. Soldering irons may have interchangeable tips for different types of work. Pyramid tips with a triangular flat face are useful for soldering sheet metal . Fine round tips are useful for electronics work.
Soldering irons often come with a stand to hold the hot iron. The stand may have a sponge and flux pot for cleaning the tip. Some soldering irons for professional use come as part of a soldering station, which allows the exact temperature of the tip to be adjusted, kept constant, and displayed.
A general rule is that the tip of the soldering iron be cleaned and coated with solder between sessions of use.
Soldering for plumbing typically does not use a soldering iron but a blow-torch instead.