Square Small Magnets

The office magnets are made entirely of neodymium magnets, which are indeed super strong when compared with regular ferrite office magnets. Most office magnets are covered in ABS plastic, which provides the following benefits:

Scratch resistance: delicate surfaces like whiteboards or magnetic glass boards are protected from scratches.
Waterproofing: these magnets are rust-resistant and can be used outdoors as long as the plastic coating remains intact.
Friction: plastic coating greatly increases the magnetic adhesion force in shear directions.

These magnets are suitable for glass boards, whiteboards, office or home refrigerators and can adhere well to magnetic whiteboards, refrigerators, and steels.