* Made of High Quality Materials, Durable * Neck Adjustment Nut and Bridge File Set with 13 Round Files and 1 Flat File, Universal for String Instruments, * Such as Guitar, Mandolin, Bass and Banjo, etc. it will make the string slots very smooth and work quietly.* Universal for string instruments, guitar, mandolin, bass, ukelele and banjo etc.* 12 different dimensions of round files for polishing string slots and makes the string slot very smooth.* 1 flat file for burnishing nut and bridge.* Small size, convenient to use and carry. Specifications:* Material: Metal * Color: Blue (as shown in the picture)* Size: 7.7*3*1.5cm (Height*Diameter) (Approx.) * Weight: 23.5g (Approx.) * Quantity: 1 Pc Package Contents:1 * Neck Adjustment Nut Bridge File SetNote:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.