All magnets are not created equal. Neodymium magnets are a permanent type of Rare Earth Magnet, made from neodymium, iron, boron and other transition elements. * * Affordability & availability contribute to this strong magnet's growing popularity. Neodymium magnets are available in a wide range of shapes, sizes, and grades. These are the strongest permanent magnets on the market today. * * Neodymium magnets have many uses, from a variety of industrial applications to an unlimited number of personal projects. They can be used in the manufacturing of motors, alternators, and actuators and also great for crafts, school experiements and DIY jobs. Perfect for small yet strong closures and fasteners and ideal for keeping objects secure on any ferrous metal surface.