These double-sided self-adhesive wall hooks are made of high-quality PVC materials, no traces, no residues. With good elasticity and toughness, not easy to tear, and will not leave any difficult to remove glue marks to keep the walls clean. Widely used on a variety of surfaces, like Glass, Metal, Wood door, Plank, Metal, Stainless steel, especially great for hanging shower or bath accessories in a bathroom or kitchen utensils and tools on a tile backsplash. 1. Before installing the adhesive hook, please make sure the surface is clean, dry, free from dust and oil, and wipe it dry first. 2. Tear off the back of the protective film and your fingers don't touch the adhesive. 3. Paste it on any smooth surface and press it tightly to remove any bubbles. 4. It is recommended to leave 12 hours before hanging any item to ensure the product is firm and fixed.