LittleBone Fret File
LittleBone fret file helps to reshape frets worn by use or flattened out after fret leveling. LittleBone Fret File is the simplified version of a more complex project based on alternative concepts of fret work by inventor Davide Bissoli. The abrasive base has an optimal operating angle (or more optimal angles) and a compact shape that make it perfect for any skill. The abrasive surface is configured to work only where it is necessary while preserving the center of the fret. It can also help to correct the intonation of the frets. Littlebone Fret File Standard is #400 grit. It is optimal for Rectify Master leveling systems which can help to level the frets without leaving big edges on their sides, most of the times. There is also the #150 grit version for more aggressive filing. LittleBone400 is also included in the RR Kit (Reload/Refinishing Kit).
NOTE: if you are thinking to buy LittleBone for stainless steel frets, please remember that diamond files can be quite delicate and might not last like the others. Although, buyers report that LittleBone #150 is not bad on stainless steel frets.
The LittleBone Fret File is protected under U.S. Patent number 9,070,347