? 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 service life. ? Perfect size? Strong adhesive force: Product size: 24 pieces? 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 whiteboard). ? Easy to grasp? Portable: Extremely easy to grip tapered handle allows magnets to be attached or moved easily. Packed in a portable storage box for better storage of your magnets. Never lose a magnet! ? Large Shelves: Great for attaching paper, photos, cards, and notes to various metal surfaces such as refrigerators, whiteboards, aluminum shelves, etc. Also suitable as hooks for hanging keys etc. [NOT for magnetic glass boards or suitable glass magnetic boards!] ? Warning: ① Not suitable for children under 3 years old. There is a risk of suffocation from small parts that can be swallowed. ② KEEP patients