POWER MAGNET STORE Pack of 5-1/2" Dia x 1/4" Thick with 1/8" Hole (12.7mm x 6.4mm x 3.2mm) Neodymium NOT Countersunk Ring Magnet, Strong Pull approx 4.2Kg Neo Disc Round (5)

one of the magnets broke after just a few days, the magnetism seems too strong for the way they are manufactured

These magnets are really strong. Did just what I wanted.

Quite a strong magnet