Pot magnets with screw hole - also called countersunk magnets - are compact magnet systems with a steel shell and a countersunk hole for easy mounting. The bolt with a flat countersunk head falls flush with or in the top of the magnet. This optimizes the attracting surface of the pot magnet.
Thanks to the shell of these magnet systems, the magnetic field strength increases and the pot magnets are more resistant to corrosion or chemicals. Pot magnets have a single attracting surface. This precludes dispersion of the magnetic field. Pot magnets with countersunk hole are available in various sizes and types such as neodymium, ferrite and AlNiCo.