Not limited to billboards fixation, it can also be used for the installation of decorative items such as picture frames Double layer cushioning pad, effective nonslip and shockproof, cushioning fixed fit without slipping Adjusting screw length to clamp glass / acrylic of different thicknesses These Screws have complete accessories, and beautiful installation, and can be used in a variety of scenes, suitable for glass, doorplates, billboards, posters Make of stainless steel, rust and resistant, ensuring long term use, Manufacturer: Whoasyst