SUPER STRONG N52 MAGNETS: High quality rare-earth N52 neodymium magnets have high resistance to demagnetization, will not lose magnetization around other magnets or when dropped. Neodymium magnets are currently the strongest type of permanent magnet. STRONG MAGNETISM ADHESION: These super strong magnets are strong enough to hold up to 5 photos or more than 20 sheets of A4 paper per magnet, which won't slide easily on a metal surface. [NOT suitable for magnetic glass boards!] [NOT for children under six due to small parts size!] LONG-LASTING TRIPLE COATED DESIGN: Made of three layers (nickel + copper + nickel) triple coating and industrial grade N52 material, which has high resistance to oxidation and corrosion. It is durable and long lasting. MULTIFUNCTIONAL USE: These magnets are perfect at work for sticking receipts, chores, papers or instructions against a magnetic board or at home for hanging children's artwork or family photos against the refrigerator. Ideal for model building, for crafts, experimentation and luminaries of all kinds. SAFE: Polished magnets with anti-scratch coating for better grip on smooth surface and extra protection. Never worry about scratches again.