Prefer the look of hidden hardware? Heavy Duty Recessed Wall Standards are for you. These wall standards are specifically designed to appear hidden once they’ve been installed. The Heavy Duty Wall Standards work exactly as the name indicates: they can support heavy displays with ease while remaining out of sight. These Recessed Wall Standards are intended for 1″ slots and 2″ O.C. For use with 5/8″ or 3/4″ panels.