well I tightened the wire screws and it cracked the brown plastic the click went. I had the largest wire there, and maybe I overtightened the screws? I bonded it with epoxy with some 1/32" FG fiber. It's really solid now. I haven't tried returning it as it might be my fault. It does its job, works fine, but take care not to over tighten the screws. I bought this because they sell it cheap. You really don't lose the key as you can't just turn it on and off with the tool. I used a short piece of wire between the cover screws and the key has a small hole for the wire to go through and the key stays in the switch to turn it on and off.