Excellent quality: The surface of the magnets is triple coated: nickel-copper-nickel. The solid metal surface protects the magnet from breakage, which greatly extends its life. Perfect size Strong magnet: Product size: 24PCS 12x16 mm. Each neodymium magnet can hold up to 20 sheets of A4 paper on a metal surface (only 10 sheets of A4 paper on a whiteboard). Widespread Use: Ideal for attaching paper, photos, cards and notes to various metal surfaces such as refrigerators, whiteboards, aluminum shelves, etc. Also suitable as a hook for hanging keys etc. Not suitable for magnetic glass or magnetic glass boards! Easy Grip Relocation: Extremely easy to grip conical handle makes it easy to attach or move magnets. Packaged in a portable storage box to better store your magnets. Never lost a magnet! Warning: Not suitable for children under 3 years old. There is a risk of suffocation of small parts which can be swallowed. KEEP AWAY from patients with pacemakers and defibrillators! Ideal for living room, kitchen, office and school Perfect size and super magnetism not only affect the beauty of photos, but also can fix photos stably. It is the best choice for organizing photos. With its convenient handle, the magnet can be used as a hook to hang keys, dry towels and other small items. Easy to use and remove, making meetings more organized and smooth. Corrosion resistant nickel-steel alloy metal housing extends magnet life. Magnets can be used for a long time.