Ferrite pot magnets, also called Cup Magnets, Magnetic Holders, are made of permanent magnet encased in a metal pot, and feature a hole, thread, boss or removable hook in centre of the magnets. The pot is an essential part of the magnetic circuit. the active magnet face is not enclosed. When Pot magnets hold any metal parts, the magnetic force in this circuit is stronger than that of alone magnet. It is the most efficient design for gripping, also provide an easy, non-destructive way to suspend objects or attach them to metal.