Neodymium Ring Magnet 8 x 3 x 5 mm N48
 
A neodymium (NdFeB) ring magnet is very strong. It is magnetised in a strong magnetic field during manufacture, providing high magnetic attraction in a compact size. Alongside high magnetic attraction, the surface coating helps improve durability. N48 indicates the magnetic grade. NdFeB grades commonly range from N35 to N52, with higher numbers generally indicating stronger magnets. The ring magnet fits readily into a recess or around a hole and can be used on a shaft or screw, or as a spacer.
 
The Ø8/Ø3×5 mm ring is useful for DIY projects, including lids, boxes, small holders and shaft or screw mounting. (Ø8/Ø3×5 mm) For best results, ensure direct contact with the surface. The magnet provides a particularly strong hold on solid steel.
 
Warning: keep away from children. Swallowing magnets can be life-threatening. Seek immediate medical attention if swallowing is suspected. Magnets can snap together quickly and pinch fingers. They are hard but brittle, so do not allow them to collide. Keep them away from medical devices, cards and sensitive electronics.