These aren’t just any magnet clips to fasten your kids’ artwork to the refrigerator: these Endo Magnet Clips are “a solid mass of neodymium, silicone and steel” that can hold up 16 ounces of whatever.

After placing a powerful neodymium magnet against mechanical hard drives to see if they would fail, we moved on to other office gadgets. People are tentative when placing magnets around electronics, ...