I bought these round ones and some stick shaped ones. The rounds arrived yesterday and the bars should arrive today. None of them were broken. The screws are made of non-magnetic metal. They are strong enough to do whatever I wanted. I bought these to stop using the glue that some metal poster companies supply to stick to the wall and hold in place what is on the other side a magnet. Glue is disposable. So if I wanted to move them every time I wouldn't be able because I couldn't move from one place to another. So I tried to get them instead. Even if you use one of the medium sized metal posters it will stay in place. This gives it a fulcrum even though it's a circle so you need to balance it properly. Using 2 would be ideal. I tested how strong it would be on it before hanging it. The magnet sticks to it very well and I used a hex wrench to pry the magnet off the metal poster to avoid damaging the back of the poster. I ordered 12 magnets in total. I can order more as long as I know the batch is good.
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