Product Description 28 bit large capacity storage, made of eco-friendly material, no punching design, sturdy and durable, very convenient to carry, no punching or nailing. Gift: Nail free screw sticker, adhesive can be used repeatedly Installation steps: 1. Clean the wall 2. Peel off the non-marking film 3. Determine position and press firmly 4. Leave it for 1 hour before use.