Bought these power strips to hang some light paintings in the living room. I would recommend to not use it on any painted surface as it took out chunks of paint when trying to remove the adhesive. Tonight a small painting that was up since August suddenly came tumbling down because the strip gave out. It unfortunately landed violently onto some glass lights underneath and now shattered glass is all over the living room floor. Thanks for this experience. Nails in the wall now seems less damaging... hehehe