I ordered these rare earth magnets and some rectangular ones and these, for whatever reason, are quite a bit more powerful. It's almost comical how you can move another magnet from 6 inches away. If you go to reassemble a stack of these, be prepared for pinched fingers. Really! Really strong. It's almost not possible to pull them apart directly, you need to slide them away. I also really like the countersunk hole in them because they are easily mounted. Zip, with a drywall screw. V happy w/ the purchase. Good magnets are fun.
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