Brass Bezel System for hanging heavy frames, a Bridge plate is screwed onto the two opposing sides at the back of frame. (Screws supplied) The two brass bezels are then fixed into the wall using a standard screw & raw plug (not supplied), the frame is then hung onto the wall by placing the fixing plates onto & over the bezel, giving a flush and very secure finish ( only suitable for frames with a width of 60mm or above )