Specifications:Material: PVCSticker size: About 5cm * 8cm.Screw length: 6-16mm.Screw size: 4mm diameter, 6 different screw lengths to choose from (6mm,8mm, 10mm, 12mm, 14mm, 16mm)The correct screw length is recommended:6mm:suitable for brackets with a thickness of 1-3mm8mm: suitable for brackets with a thickness of 1-5mm10mm: suitable for brackets with a thickness of 1-7mm12mm: suitable for brackets with a thickness of 1-9mm14mm: suitable for brackets with a thickness of 1-11mm16mm: suitable for brackets with a thickness of 1-13mmHow to use?* 1. Clean the oil/dust/water on the surface and place the item on the wall to determine the position.* 2. Mark the position of the hole with a pen.* 3. Uncover the transparent protective film on the back of the patch.* 4. Install the center of the screw to the center of the mark to remove air from the hook.* 5. Paste the hooks one by one and check if the installation is safe.* 6. Wait an hour for better results.