I've got an N52 neodymium magnet which has a hole through the centre so it can be suspended on a piece of string. I use it occaisionally to see if a piece of metal is weakly magnetic or not. If it is, it will stick to this magnet. The magnet is small, but powerful. Here are a couple of demo pics I fired off to give you an idea...
It's difficult to show that the hammer and the circular saw are suspended rather than laying on something, but believe me they are!
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