Feature: 1. This set of files is mainly used for trimming and polishing the frets and corners of instruments such as guitars and basses. 2. Made of high-quality metal materials, it has good wear and high grinding efficiency. 3. The kit contains 3 specifications, each with different sizes of file teeth, suitable for polishing different musical instruments. 4. Three files are stringed on a keychain, which is convenient to carry and use and not easy to lose. 5. Suitable for most instrument specifications on the market, such as electric guitar, acoustic guitar, bass, etc. Specification: Item Type: Guitar Sanding File Size: Approx. 180 x 150 x 3mm / 7.1 x 5.9 x 0.1in Material: Metal Package List: 3 x Guitar Sanding File(Including 3 Specifications)