Review on DIYMAG 40X20Mm Super Strong Neodymium Disc Magnet, Permanent Magnet Disc, The World'S Strongest And Most Powerful Rare Earth Magnets - One Piece by Ronald Orear

They are everything they claim to be. If you get the 2 stuck together… watch out, keep your fingers out of the way because you can get hurt easily. And be prepared for a fight to separate them.My only complaint is that I wish they had a thin plastic or rubber case option, because they hit so hard when they get near metal, and it’s easy to crack and chip them. Just a thin layer of hard plastic or, like the wall thickness of a plastic bottle, would prevent chipping and cracking and have a negligible effect on the magnetic strength