A soldering iron is a tool used to melt and join two pieces of metal. There are several synonyms for this tool, including a soldering gun, soldering pencil, soldering wand, and soldering station. A soldering gun is a type of soldering iron that heats up quickly and is ideal for use on larger projects. A soldering pencil is a smaller, more precise version of the tool that is ideal for intricate work. A soldering wand is a portable, battery-operated tool that is perfect for using on-the-go. A soldering station is a complete set that includes a soldering iron, stand, and other accessories. Regardless of the specific name, a soldering iron is an indispensable tool for any DIY or electronic project.