Love these! I had lost an earing a few months back and splurged on a new pair. The back of the new earing kept popping off if it caught on anything and I was terrified I would lose them. My mother in law suggested locking earing backs, which I had never heard of. So off to Amazon I went. When I first saw the price of these I was a little put off. $50 seemed like a lot to me but my husband told me "$50 is a lot cheaper than having to replace your earrings every time you loose one." I bit the bullet and bought them, and let me tell you, best $50 I've spent.