These wall-mounted curtain tiebacks can work with curtain cords in various colors and styles, whether simple or gorgeous, classic or modern. You can also hang these hooks on other walls to hang small items such as window, drapery, clothes, coats, towels, hats, or accessories.SpecificationColor: Dark GreyMaterial: Zinc AlloySize: 48 x 37 x 25 mm / 1.9 x 1.5 x 1 inch(L*W*H)Screw Specifications: M4 x 14.5Hook width: 28.7 mm / 1.1 inchSphere length: 20 mm / 0.8 inchScrew size: 30 x 4 mm / 1.2 x 0.2 inch (L*Dia)Packing List: 2 x Hooks, 2 x Screws, 2 x Expansion TubesAdvantage1. These curtain holders are made of premium Zinc alloy which resists rust and corrosion. Pre-drilling is required, and the diameter of the hole is generally 1-1.5mm smaller than the diameter of the screw.2. Screw end design for easy installation. If the curtain hook is mounted on a wooden surface, screw it in. If it is installed on a concrete wall, you will need to use a drill to drill holes in the wall and install the gray expansion tube to the wall.Instruction1. Drill holes in the wall.2. Drive the hook into the hole.3. Install the screws on the hook.4. Turn the hook to screw the hook bolt in.NOTE: Please confirm the size before placing an order.