disk N45 neodymium magnets is high grade Neodymium magnets. They are much, much stronger than the more common Ceramic Magnets, ALNICO Magnets, or lower grade Neodymium magnets ( Grade N28 neodymium magnets, N35 neodymium magnets, N38 neodymium magnets, or N40 neodymium magnets ). They are also more expensive.
YSN-01W disk N45 neodymium magnets, disk rare earth magnets