LittleBone Fret File – Brass & Stainless Steel Versions

The LittleBone Fret File was designed by inventor Davide Bissoli as a compact and precise solution to help bringing frets back to their natural crown after leveling or wear. Its angled abrasive surface works only where it is needed, helping to preserve the fret center and support accurate intonation.

Brass Version – Native #400Grit and #150Grit

The Brass LittleBone is the original model that started it all. With its #400 grit abrasive, it remains the natural choice for most applications on nickel-silver frets. Smooth, effective, and reliable, it carries the authentic feel of the first concept and continues to be a good option for everyday fretwork.
For those who occasionally face stainless steel frets, the #150 grit Brass version can also be used, though it is more aggressive and less durable than the stainless model.

Stainless Steel Version – Industrial #320 Grit

The Stainless Steel LittleBone is a tougher variation, built with an industrial-grade base and equipped with #320 grit abrasive. It delivers strong and consistent performance not only on nickel-silver frets but also when extra durability is required, such as on stainless steel frets.
While more aggressive in action, it shares the same design philosophy of precision and simplicity.

👉 Two versions, one philosophy: both LittleBones keep the frets in shape, and optimize playability of the instrument.