Ultra strong (N35) Neodymium magnet disk with slightly rounded edges. Plated with nickel. The diameter of the disk is 0.94″ and the thickness is 1/4″. Warning: Gloves and goggles are required when handliing these magnets. Warning: Neodymium magnets should always be handled carefully. Some that are slightly larger than the size of a penny are powerful enough to lift over 10 kilograms. Neodymium magnets can severely pinch skin or fingers, or even break bones when suddenly attracted to a magnetic object.