These magnets are small but super strong. Just the fact that they had to put spacers between the magnets should give you an idea. I got these magnets because I was trying to magnetize a dry erase marker holder to my glass board. But because the magnet is on the other side of the glass, every magnet I have bought has not been near strong enough. This one does it perfectly. But do head their warning, be careful when separating these magnets for use, because bring the magnets too close to each other without the spacer and they will shatter from the sheer force of these things. I didn’t take this seriously enough and broke one of the magnets, but was 100% my fault.
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