With screws and expansion tubes, so you only need to drill a small hole in wall to mount the Billboards on wall, which is very Make from Zincs Alloys, smooth and bright in surfaces, rustproof, scratch resistence, and can be used for long terms Suitable for indoor or outdoor use, such as glass door, glass cabinet, shower door, stairs handrails, glass railing, glass display or panel, countertops Smooth surfaces, make the screws look beautiful, and clean Can fix and decorate Glass greatly, create more elegant look Each advertising Nails is equipped with a rubber pad, which can protect the Billboards and the screws from leaving scratches on the glass, Manufacturer: Obotsnoi