These strong Neodymium magnets are extremely strong relative to their size and is extremely useful for various applications or, just plain fun to play with!

Applications 
Acoustic field: the speaker, receiver, microphone, alarm, stage audio, car audio and so on. 
Electronics: permanent magnetic actuator vacuum circuit breakers, magnetic relays, meter, 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. 
Other industries: magnetized 
Wax, pipe descaling, magnetic fixture, automatic mahjong machine, 
magnetic locks, doors and for windows magnetic, magnetic luggage, leather 
magnetic toys, magnetic tools, gifts and packaging.