The principle of this pot magnet is to glue one piece of solid disc magnet, either NdFeB or Ferrite, into the steel housing. Then, depending on customer's applicational requirement a cover made of stainless steel is available.
Pay Attention When You Use Shallow Pot Magnet / With Steel Cover. Being flat makes it easy for these magnets to stick to each other even stronger and not easy to separate, which may bring some unexpected danger if not operated correctly. So, always wear gloves before you do anything with these pot magnets and operate with great care to avoid sudden attraction of them.