Neodymium ring magnets (also called cylinder magnets) are big, flat disc magnets with a tiny hole in the middle. They were devised by a silversmith at Toledo, OH. Neodymium magnets are quite common, however they do not have the widespread appeal that any magnetic materials do. However, it’s not because they’re ugly or badly made. It’s because there are a good deal more other sorts of magnets available that are much better quality and considerably more economical.
The largest difficulty with neodymium ring magnets is that they have a tendency to lose their shape a little too fast, which causes them to shed their usefulness for many years. If a few of these get tangled up in a vehicle, for instance, and it’s in transit, then the magnets will likely to begin hurting. They are still fairly robust, though, so you likely won’t have too much trouble simply pulling them apart. But the point is the cost of replacing a worn misaligned or out magnet is a lot greater than the purchase price of a fantastic quality ndfeb ring magnet.
Fortunately, there are strategies to get a great deal on these types of magnetic devices. There are magnetic craft stores, like Hobby Lobby or Pier 1 Imports, that sell quite cheap neodymium ring magnets and other similar products. But you can also buy them off of eBay, Amazon, Craigslist or directly from the manufacturer.