Neodymium Rod Magnet 10 x 20 mm N48 Diametrically Magnetised
 
Neodymium (NdFeB) is among the strongest magnetic materials and provides substantial holding force for its size. It is much stronger than conventional ferrite magnets and generally has a protective coating because the material can corrode over time. N48 indicates the magnetic grade, commonly ranging from N35 to N52; higher numbers generally indicate greater magnetic attraction. The cylindrical shape is practical: it fits readily into a hole or recess and provides good contact on flat metal surfaces.
 
At Ø10×20 mm, this magnet is suitable for stable, strong attachments while remaining manageable to handle. (Ø10×20 mm) Paint, film or gaps noticeably reduce magnetic attraction. The magnet performs best on a flat, clean surface.
 
Warning: not suitable for children. Swallowed magnets can cause serious injuries. Seek urgent medical attention. Magnetic attraction is strong. Bring magnets together and separate them carefully to avoid pinching injuries and chipping. Keep them away from medical devices, cards and sensitive electronics.