I ordered 4 of these and I've used 2 so far. The first, the lever on the clasp broke off the first time I opened it-I just replaced the clasp with a similar one. The second, the loops holding the clasp were bent at an angle that made the clasp press into my neck-uncomfortably. When I tweaked the loops, that fixed it. Otherwise, these are easy to use-almost an instant necklace, just wonder about the overall quality.