Aluminum carpet trim can be used as a wall hanger. Synopsis: Aluminum carpet trim can be used as a wall hanger. Carpet trim creates a hidden wall hangerTo hang a pair of heavy mirrors, I used aluminum carpet trim as a French cleat. Attach one piece to the wall (be sure to screw it into the studs) and the other to whatever you are hanging. The metal trim pieces hold their cargo close to the wall, which helps to keep them hidden from view.—ALAN KUPCHELLA, Fairport, N.Y.