Soldering irons, also known as power torches, are used to seal pipework within the sanitation system of a building. They can also be used for general brazing and soldering tasks. They emit a powerful gas flame which can be finely adjusted to weld items together at high temperatures. There are designs that feature an automatic push-button ignition for ease of use, and a special function that allows the torch to be used at any angle. A stability base and automatic cut-off function provide safety during use, while a choice of designs offer different power levels to get the best match for the job at hand.