Medium-sized, strong Neodymium (N42) pot magnets with an M4 threaded collar on the non-magnetic face. Magnetism is concentrated on one face to provide the maximum holding force.
Pack of 1.
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Neodymium pot magnets are made of a powerful Neodymium magnet sunken in to a steel shell meaning that the south pole is on the centre of the magnetic face and the north pole is on the outer edge around it. The steel pot increases the adhesive force of the magnets giving them an incredible 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.