A pot magnet is a permanent magnet encased in a steel shell, which is sometimes called a pot, hence the name ‘pot’ magnet. A permanent magnet emits a magnetic field without the need for any electricity. For more information, see: Magnets glossary.
The steel shell helps the pot magnet by increasing its holding power and providing the magnet with added strength and stability.For information on how a pot magnet works, see the page: How does a pot magnet work?
Pot magnets are often used as magnetic bases and magnetic holders for large supermarket ceiling signs. For more information, see the page: What is a pot magnet used for?