Ferrite Y30BH Pot Magnet for Arts, Crafts, Model Making, DIY and Hobbies - 40mm dia x 8mm thick x 5mm c/sink - 15kg Pull

Outstanding value for money, these ferrite pot magnets are made of a ferrite 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.