We used magnetic paint primer on our wall so we could hang the kids art work with magnets. We didn't use enough coats of the primer so it's kind of weak. I'm compensating by using these crazy strong magnets and they solved the problem nicely.These are so freaking strong. Read other reviews, be careful not to stick them together without the spacer and beware handling them. I accidently pinched my hand skin between two of the magnets a few times ! I bought 3 boxes and none of these have broken regardless of my clumsy handling.
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