A   neodymium magnet is a ferromagnetic material. Regarding its magnetic   properties, it belongs to the most stable types omagnets. The magnetic   neodymium alloy consists omicrocrystalline particles that are placed in a   strong magnetic field during production so that their magnetic axes are   aligned in the same direction. In terms oits magnetic values, it   significantly exceeds the values otraditional strontium ferrite (18 times   greater than the value), as well as the first generation othe first rare   earth magnet, samarium-cobalt magnets. The type designation (N). This type   omagnet has a high tendency to corrosion, so it leaves the production line   with surface protection. Higher values indicate stronger magnets (for   example: N48). There is a widely known international classification for   sintered NdFeB magnets. Their values range from 35 to 52. The first letter N   before the values represents neodymium, meaning sintered NdFeB magnets, for   example N52. The inherent forces orare earth magnets can present great dangers.   Neodymium magnets larger than a few cubic centimeters are strong enough to   cause injuries to body parts caught between two magnets, even bone fractures.   Ingestion omagnets can cause death; ithis happens, a doctor should be   consulted immediately. The values in the "Technical Data" are for   informational purposes.