1. High quality: The surface of the magnet has three layers of coating, which can protect the magnet from corrosion and significantly extend its durability. The final layer of nickel provides a smooth surface that won't scratch anything. 2. Supplies: Extremely adhesive, very suitable for attaching posters and notes to flip charts, such as metal hooks, note holders on refrigerators, nail boards, whiteboards, etc. [Not applicable to glass panels] 3. It is very convenient and portable: easy to grasp, small in size, and can be easily removed from the surface or moved at any time. Specifications Material: neodymium iron boron+magnet Category: Fixer Color: Silver Surface electroplating: nickel plating Size: 16 * 12mm Applicable: All magnetic surfaces, such as refrigerator magnets, offices, classrooms, whiteboards, notes, maps, calendars, etc Package includes: 1-50pcs Magnetic Thumbtacks