These high quality magnets are made of a
magnet sunken in to a steel shell meaning that the north pole is
on the centre of the magnetic face and the south pole is on the outer
edge around it. The steel pot increases the adhesive force of the
magnets giving them a strong hold for their size. An added advantage of
pot magnets is that they are resistant to chipping or cracking following
constant impact with a steel surface.
Size 18 x 12.5 x 6 cm