Extremely Strong Magnets - Each neodymium magnet has a super strong adhesive force (N52 neodymium magnet), which can easily hold up to 22 sheets of A4 paper, photos, banknotes and other objects. Attention: These magnets are not suitable for glass magnetic boards! Size: 12x16mm. Premium Quality - The magnet is made of neodymium, which is one of the strongest and most permanent magnetic materials. The surface of the magnets is triple coated: nickel - copper - nickel. This protects the magnets from corrosion and extends their lifespan. The smooth surface that cannot scratch your magnetic plate or refrigerator. Very comfortable to use - They have a beautiful shape that is easy to grip, easy to install or remove. Much more practical and easy to separate than round magnets. Wide Application: Can be used to collect or arrange photos, printing papers, notes, receipts and other items on the blackboard, refrigerator, bulletin board and other magnetic surfaces. It can help you organize and save space anytime and anywhere.