A   neodymium magnet is a ferromagnetic material. Regarding its magnetic   properties, it belongs to the most stable types omagnets. The neodymium   magnetic 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 those 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 corrode, 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.