These giant discs are killer strong, especially in grade N52. Only purchase these discs if you are well versed in handling very strong neodymium magnets. Two of these stuck together are virtually impossible to separate by hand. They can pinch very hard and cause physical harm if they are not handled with extreme care and respect. One of these discs has a pull force of over 110 lbs if attached to a steel plate.
This size is also available in grade N42 as part number DX8C