About Customization: the width can be customized to 15cm or 20cm, and the length is unlimited. Wall drilling installation, can bear 10 kg, for all kinds of walls. North American black walnut, dark and shiny, delicate and thick, clean lines. Black walnut and brass hook match naturally. Installation instructions 1. Put the board against the wall, using a marker pen to marks the hanging point; 2. Electric drill 6mm bit, and drill 3cm deep hole at the mark position; 3. Hammer in expansion screw; 4. Hang the copper bracket. This product is designed and provided by Jiangzao.