Neodymium Block Magnet 10 x 4 x 1 mm N40H
 
An NdFeB (neodymium) magnet provides high magnetic attraction for its size, making it useful for technical projects, DIY and industrial applications. Its magnetic attraction is greater than that of ferrite magnets, and the surface coating helps reduce corrosion. N40H indicates the magnetic grade. NdFeB grades commonly range from N35 to N52, with higher numbers generally indicating stronger magnets. The rectangular shape is useful for frames, edges and applications requiring an elongated, stable magnet.
 
The 10×4×1 mm block is suitable for DIY projects, workshop organisation and lighter attachments to flat metal surfaces. Holding force depends strongly on the thickness and condition of the metal surface. It is greater on thick steel than on thin sheet metal.
 
Warning: keep away from children. Strong attraction can cause pinching injuries, and the magnets may break. Store them with spacers. Keep them away from bank cards, sensitive electronics and medical devices.