The magnets are excellent. Very useful, among other things, as caravan locks and for securing most metal objects. The only suggestion for the seller would be to use better quality spacers. I usually see white nylon washers that hold their shape fairly well. They came with very thin polyethylene that didn't fit, except maybe a flimsy shipping barrier. When the magnets are separated, the polyethylene simply folds like paper and the magnets fly through and collide with each other. That's why I had a chip. The magnets themselves are very strong and appear to be of good quality. Happy with the purchase.