Artificial magnets: divided into hoof magnets and strip magnets, are the most common in everyone's life, and hoof magnets are popular. A single-sided magnet is a magnet that is magnetic on one side and weak on the other side. The method is to wrap one side of the double-sided magnet with a specially treated galvanized iron sheet so that the magnetic side of the wrapped side is shielded and the magnetic force is refracted to the other side. The other side will be enhanced in magnetism. If there are occasions, only one side is magnetic, and the other side may cause damage or interference if it is magnetic; in some cases, the magnet on the box only needs one side to be magnetic, the other side may or may not be magnetic, and it is useless. This use of single-sided magnetics will greatly reduce costs and save magnetic materials.