Neodymium Block Magnet 50 x 20 x 10 mm N48
 
A neodymium magnet (NdFeB) is a very strong magnet magnetised in a strong magnetic field during manufacture, providing high magnetic attraction in a compact size. Its magnetic attraction is greater than that of ferrite magnets, and the surface coating helps reduce corrosion. N48 indicates the magnetic grade; NdFeB grades commonly range from N35 to N52, with higher numbers generally indicating stronger magnets. The rectangular block shape is practical for assembly. It is easy to align, provides a good contact surface and fits well into fixtures and grooves.
 
This substantial magnet has high magnetic attraction. Handle it carefully and avoid bringing it suddenly close to other magnets or metal objects. 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 medical devices and objects sensitive to magnetic fields, including cards and electronics.