Composition Structure Each advertising screw holder is composed of two silicone washers, a small screw, a screw rod, a base and the plastic expansion tube. Its cover diameter of the screw rod is 19 mm, its height of the screw rod cover is 5 mm. The small screw is 19mm, the height of the base is 20mm. They can be fixed on the wall very well.Delicate Panel The advertisement screws are very exquisite. The surface treatment of the wire drawing process Steel has a strong metal feel, it can ensure its surface is durable, and it has the beautiful appearance. It has the advantages of anti-wear, of anti-oil, anti-fouling.Excellent Material Advertising nails are made Made of high quality stainless steel, not easy to rust, workmanship and texture are good. They are sturdy and durable. And they have a long service life.Easy to Install The advertisement fixing screw is easy to install. He you just fix the expansion tube to a wall or a wooden plate, then the bottom of the advertising nail is fixed to the wall with screws, then put on the glass, finally tighten the screws, everything is perfect.Wide Application The support of advertising wall can be used to attach signs, billboards, building signs, glass, photos, etc.Advantages of Advertising Screw Mount:Solid stainless steel screws: more sufficient than the market screws, more durable. The silicone washers can ensure that the screws fit better and not easily fall off. Made of classic stainless steel, beautiful and elegant, not easy to rust, long service life.Very practical and suitable for many living places, whether office or home, or public places.How To Use:1. Use a drill to make holes in the wall (the hole size is the same as the diameter of the expansion tube);2. Hammer the expansion tube in the hole in the wall;3. Separately unscrew the advertising nail base and the screw rod;4. Put the small screws are passed through the base, use a screwdriver to screw them on the expansion tube;5. Pass the screw rod through the advertising board/plexiglass, then screw them into the base.Specifications:Material: stainless steelColor: silverScrew rod size:cover diameter:19mmcover height:5mmBase length:20mmPackage package:25pcs Brackets advertising screws25pcs Small screws25pcs Expansion Tube"