This item is a professsional guitar frets sanding millstone saddle nut repair tool set. Bridge saddle nut set is made from bovine , high strength, wear resistance, great durability at the same time embodying a vintage and classic style. Good helper for bass guitar players, also for other metal polishing. Very useful for luthiers, guitarists, and many DIY fret works. Feature - ColorAssorted Color - Material: Bovine - Millstone: 99.5 x 8.8 x 4mm - Frets millstone for grinding or polishing and wire product replacement. - Bridge nut and saddle are made of cattle with a layer of on surface, much harder and will give better tone than the plastic parts, offering you attractive tone than other plastic parts. resonance and delay sound. - Good helper for bass guitar players, guitarists, luthiers and many DIY fret works. - , maintenance and cleaning tool for guitar, bass, ukulele, mandolin, banjo, etc. Package list: 1 x Guitar Fret millstone 1 x Set of Bridge Saddle Nut