Specifications:Super strong rare earth magnets, they are hard to break apart once they get stuck with each other.Perfect for sticking notes on fridge doors.It suitable for DIY projects, such as whiteboard fixing, adsorption of various steel parts, fixing tissue box on the roof, etc..Usage:Acoustic field: the speaker, receiver, microphone, alarm, stage audio, car audio and so on.Electronics: permanent magnetic actuator vacuum circuit breakers, magnetic relays, meter, sound meter, a reed switch, sensors.Electrical field: VCM, CD/DVD-ROM, generators, motors, servo motors, micro-motors,motors, vibration motors.Machinery and equipment: magnetic separation, magnetic crane, magnetic machinery.Healthcare: MRI scanners, medical equipment, magnetic health products and so on.Wedding corsage badges, etc., can be replaced with a magnet attracts every other clothes pins, so as not to damage the dress. For the overlying metal drawing board for fixing the drawing paper. Magnetic blackboard whiteboard fixed file drawings.Advertising magnets available to replace the original fixtures, at any time convenient to replace the ad content.Models piling, you can use small magnets to connect two widgets.Studio, bulk magnet can be used to adsorb screws and other parts, even wrenches and other tools.Type: MagnetMaterial: NdFeBGrade: N52Features: Round Disc, Super Strong Magnetism, Multifunctional, DIY CraftSize: 20mm x 2mm/1.18" x 0.12" (Approx.)Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:20 x Magnet