Features: Strings maintenance tool designed for guitars, basses, violin, cello and other string instruments. Derusting felt in one side is made of special vesicant molding technique. It can easily remove the layer of oxide, rust or dirt on the surface of the strings. Lubricating felt in the other side is with rustproof and lubricating oil. It can polish the strings and avoid corrosion, so that it can maintain the strings and their life. High-quality plastic shell with slide telescopic system, which allows you to adjust the usage length accurately. Compact size and lightweight, convenient to store and carry. Specifications: Material: Plastic + Felt Item Size: 13.2 * 3.3 *2cm / 5.2 * 1.3 * 0.8in Item Weight: 65g / 2.3oz Package Size: 22.5 * 7.5 *3.5cm / 8.9 * 3 * 1.4in Package Weight: 85g / 3oz Package List: 1 * String Cleaning Tool