Magnets: We expand our assortment of powerful neodymium magnets, from tiny sizes to the largest. With disc, ring or prism shapes and nickel-plated finish. A neodymium magnet is of the rare earth magnet type and is a permanent magnet made of an alloy of neodymium, iron and boron. Neodymium magnets are the most powerful types of permanent magnets made by man. They have replaced other types of magnets in many applications of modern industry that require permanent magnets of great power; applications such as the manufacture of motors in wireless tools, hard drives and magnetic seals.