Flatirons Disc Adhesive Extra Large Plate Hanger Set (4-5.5 Inch Hangers) Easy to use Allows plates to lay flat against the wall Eliminates ugly hooks, clips, and wires Easily remove discs without damaging plates Tested and proven for more than 40 years. In addition, the Flatirons Disc Co. provides regular stress testing of the hangers imported from the United Kingdom.