Description _x000D_ _x000D_This sanding stone is a necessary tool kit for luthiers, guitarists for many DIY fret workers. It is useful to many kinds of musical instrument. Fret polishing, it gives us a nice smooth feel. Eliminate the need to mask off the entire fingerboard. Comes with 2pcs fret protector shims for protecting your guitar or bass fretboard from scratching or damaging while filing and polishing. tool for luthiers, guitarists, and many DIY fret workers. _x000D_ _x000D_Feature _x000D_ _x000D_- Color: Brown _x000D_- Material: Grindstone and Stainless Steel _x000D_- Sanding Size: 100 x 11 x 11mm _x000D_- Wide Fretboard size: 79 x 23mm _x000D_- Narrow Fretboard size: 79 x 14mm _x000D_- Authentic size, which can adapt to majority of frets. _x000D_- The shims made of stainless steel, hard-wearing and sturdy. _x000D_- 2pcs fret protector shims for protecting your guitar or bass fretboard from scratching or damaging while filing and polishing. _x000D_- The sanding stone is a great way to touch up frets. Conforms to frets to give a nice rounded profile. Idea for neck fretboard fret wire polishing. _x000D_- Great for luthiers, guitarists, and many DIY fret works.Packing list2 x Shim_x000D_1 x Sander