The Gvolatee neodymium magnets are of high quality and resistance. They are made with a steel casing that protects the magnet against damage and corrosion. With a strength of 30Kg, these magnets are perfect for hanging brochures, photos, tools, and other objects. They are easy to install thanks to the included screws. Additionally, they are versatile and can be used on magnetic boards, refrigerators, whiteboards, etc. Includes 8 magnets, 20 screws, and a storage box to keep everything organized. Remember to keep the magnets away from pacemakers and children to avoid any risks.