I bought these to replace some magnets on some led trailer lights. They work great there and the screw hole was perfect for attaching them. I was demonstrating the strength to my son with one on top of a 1.5inch thick piece of foam and one on the bottom. It was strong enough to move the top magnet but when it jumped off the edge, it snapped to the other one and split them both in two. Screwed one to a workbench and it held a 12" crescent wrench easily.
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