they're great but be careful if you get a lot of them. they break easily when you separate them and they try to magnetize back together. once you take one out, keep that one far far away from the big block. otherwise, very good and strong magnets.i used the magnets to hang up these metal posters.so far so good.the double sided tape they give you doesn't really stick on the walls that well.i had to buy extra adhesive spray to make them stick betterit's made my metal posters fall
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