BannerSaver brackets can accomodate any flat surface whether it is a wall or a square pole, with existing holes built into the design. BannerSaver brackets have two holes that accept M10 bolts with the exception of the Extra Large bracket which accepts M12 bolts. Drawings are available on demand. Learn more about mounting BannerSaver brackets on walls at our help center or call us on 1300 55 49 36 for more information.