Plumbing workers use a number of tools. They often use adjustable wrenches, screwdrivers,
and hammers. Wrenches, especially ones with a serrated jaw, are also useful for tightening and
loosening pipes. Angle grinders and hex key sets are also common. An adjustable wrench is a necessary
tool when working on hex-shaped nuts, like those on supply lines and compression fittings. It can easily
loosen pipes and prevent damage from overtightening.