The guitar nut and file set with 13 round files and 1 flat file, universal for string instruments, such as guitar, mandolin, bass, ukelele and banjo etc. It will make the string slots very smooth, and it working quietly. Features: Universal for string instruments, guitar, mandolin, bass,ukelele and banjo etc. 13 different dimension round files for polishing the string slots, and it makes the string slot very smooth. 1 flat file for burnishing the nut and . Made of metal, compact and sturdy. Mini size, convenient to use and carry. Specifications: Material: Metal File Quantity: 13 Round Files & 1 Flat File Item Size: 7.7 * 3 * 1.5cm / 3.0 * 1.2 * 0.6in Item Weight: 23.5g / 0.8oz Package Size: 8 * 3.5 * 1.8cm / 3.1 * 1.4 * 0.7in Package Weight: 25g / 0.9oz Package List: 1 * Guitar Nut File Set Note: Please notice the round file dimension show in the picture. The item only includes the file set. Universal for string instruments, guitar, mandolin, bass,ukelele and banjo etc. 13 different dimension round files for polishing the string slots, and it makes the string slot very smooth. 1 flat file for burnishing the nut and . Made of metal, compact and sturdy. Mini size, convenient to use and carry.