1、The nut file is made of stainless steel, which is strong, not easy to rust, and has a glossy exterior 2、The nut and saddle of the ox bone are inclined to compensate for the treble, which is comfortable to the touch 3、Can improve the overall grade of the guitar and has a certain effect on improving the sound quality of the guitar. 4、The cleaning cloth can be used to wipe the polished debris of the ox bone piano pillow to keep the guitar and accessories clean 5、Guitar polishing sandpaper set is suitable for acoustic and electric guitars, bass, luthier, ukulele settings 1 x File(A Total of 14 Accessories)2 x Nut1 x Wipe9 x Sandpaper Item Type: Guitar Polishing Sandpaper SetMaterial: Stainless Steel + Beef BoneApplicable Musical Instrument: Guitar