I rated them rather negatively at first because they were slightly magnetic. Well after further research on 304 and 316 stainless steel I am updating my review. Now they are magnetic, but nowhere near as magnetic as plain carbon steel. This demonstrated, as indicated in the study of the magnetism of 304 and 316 stainless steel, that both stainless metals are inherently non-magnetic. BUT they can become magnetic during welding and cold working. So it might or might not be 304. There's no real way to tell unless you analyze it. But they are pretty nice looking bearings and only slightly magnetic. A good strong earth magnet will grab them, but far from the strength of straight carbon steel. You can easily remove the magnet from them, unlike standard steel. In summary, I am basically satisfied. I believe this is stainless steel that has been cold worked to slightly alter its magnetic properties. But only time will tell for sure.
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