A pot magnet is a permanent magnet encased in a steel shell, which is sometimes called a pot, hence the name of 'pot' magnet. One surface of the magnet is coated with an iron sheet. The magnetism of the coated surface is shielded and the magnetic lines are guided to the other surface, meaning the magnetic force of the other surface is strengthened. A permanent magnet emits a magnetic field without the need for any electricity. Leyuan as the magnetic assemblies manufacturers also provides assemblies of pot magnet for you to choose.