[Multifunctional Guitar File] 13 sharpening needles and 1 flat file, a full range of sharpening needles can meet your different needs. Used to polish the grooves of the strings, so that your instrument always keeps high quality [High Quality] This guitar saddle grinder is made of high quality stainless steel, which has been finely processed and ground. High hardness, strong wear resistance, not easy to deform, can be used for a long time [Easy to carry] The file is small in size, the storage box and the file are integrated together, and the structure is compact, easy to use, easy to carry, and not easy to lose [Ideal Tool] The guitar saddle file set is specially designed for polishing musical instruments quickly. It is an ideal repair tool for guitars, ukuleles, basses and other stringed instruments [Widely Used] Comprehensive tool kit makes it easy to repair musical instruments. Used to maintain and repair acoustic and electric guitars, basses, banjos, mandolins and other stringed