Ring magnets are very versatile and are usually used in scientific experiments. For example, when demonstrating magnetic repulsion, a magnetic ring is passed through a wooden pole. When the same magnetic poles are in contact with each other, they will not touch each other, as well as magnetic levitation, electric motors, electroacoustics, Salvage, medicine, etc., a lot. That is to make a counterbore on the basis of round, square, cylindrical, ring, tile-shaped magnets, and use them together with screws.