These sturdy, NdFeB magnet discs are incredibly strong and must be handled with caution. They are grade N42 and triple plated (like all of our nickel plated magnets) with nickel-copper-nickel plating. Each of these discs has a pull force of over 25 lbs.
This size is also available in grade N52 with Black Nickel plating as part number
DX04B-N52.