This string height adjustment scale can be used for various stringed instruments such as guitars, basses, ukuleles, and banjos. It has a simple design that is easy to use for beginners and professionals alike. The material is durable stainless steel. The size is 51X89mm, making it convenient to carry. It can also be used for various measurements and adjustments, such as fret string height, nut height, bridge height, and pickup height. This is a useful item to have, so how about it? [Product Information] This product has a protective film to prevent scratches. You can use it as is or peel it off.