Holding Pot Magnets are much stronger than similar magnets of the same size and type as
they have a steel cap/pot on one side of the magnet. This steel cap redirects
the magnetic flux of one of the magnetic poles to the other side of the magnet. This enables
both the North and South Poles of the magnet to be concentrated on the same side,
thus creating a significantly increased holding capacity. They are considered the
most efficient design for holding onto steel.