Neodymium Ring Magnet 8 x 2.5 x 4 mm N48 with Countersunk Hole
 
An NdFeB (neodymium) ring magnet provides high magnetic attraction for its size and fits readily into various holders and components. Alongside high magnetic attraction, the surface coating helps improve durability. N48 indicates the magnetic grade, commonly ranging from N35 to N52; higher numbers generally indicate greater magnetic attraction. The central hole simplifies mounting and positioning, making it useful for frames, holders and repeatable installations. The chamfered edge is practical: it simplifies installation in a recess and helps protect the edge from damage.
 
At Ø8/Ø2.5×4 mm, this magnet is useful for magnetic catches, DIY, organisation and lighter attachments to steel. (Ø8/Ø2.5×4 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. 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.