This is a simple set of hooks to hang keys or other lightweight items. The hooks are designed to fit underneath a standard square light switch - simply unscrew the light switch plate, slot the top part of the model into the back of the plate, and then replace the plate and screws. This should be possible without needing to detach any wiring.

I personally use this to hang my different sets of keys to my car and motorbikes next to the light switch near my front door for easy access, and another one near my back door to hang things like shed keys and a small torch.