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 Randy Holt

Got the round ones. Pretty strong for their size. I knew this would happen eventually but it's still pretty painful. One of the little suckers slipped out of one hand and snapped together with the other one which was in my other hand. Thankfully one of my fingers got in the way and more damage wasn't done. These things are no joke. Fortunately neither one broke and I eventually pulled them apart. Definitely not a toy and definitely to be handled with care! Also, NEVER put one of these next to a credit card or any card with a strip on it (like your driver's license) or anything else that uses magnetic storage.