Neodymium Disc Magnet 20 x 5 mm N48 Diametrically Magnetised
 
Neodymium (NdFeB) is among the strongest magnetic materials, even in small sizes, and its stability makes it useful for many practical applications. Compared with conventional ferrite magnets, neodymium provides much greater magnetic attraction. A protective coating helps improve durability. N48 indicates the magnetic grade; a higher number generally means a stronger magnet, with grades commonly ranging from N35 to N52. This version is diametrically magnetised. During assembly, consider the magnetic field direction to achieve the intended result.
 
At Ø20 × 5 mm, this magnet provides a strong hold for quick assemblies, tools, DIY and general applications on steel. Even a small gap caused by thick paint, tape or an uneven surface noticeably reduces holding force. It performs best on solid steel.
 
Warning: keep away from children. Two magnets can snap together quickly, pinch fingers and crack or chip. Use spacers for storage and take care when separating them. Keep them away from bank cards, sensitive electronics and medical devices.