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I bought this to install on a metal locker. Unfortunately the signal does not work through the thin steel. I even drilled a 1 1/2" hole and it still won't work. I guess the metal messes up the signal? I also tried tapping it through a thin piece of wood and it doesnt work. I'm not sure how this is supposed to work through a cupboard door.
Great idea but... Thickness of material is a problem - it does not work on 1.25. And if it fails, you’re out of luck. Which it did we had to damage the cabinet to get it open. The card lost its program and the fobs would not work on thicker material. (5/8)