Hosco Japan 3 in 1 Diamond Fret Crown File

High quality diamond grit file for crowning frets after levelling.
Three sided for narrow, medium and wide frets. The narrow part is narrow enough for mandolin frets, the wide part is wide enough for jumbo frets.
Crown file for small (R=1mm), medium (R=2mm) or wide frets (R=3mm) frets.

The diamond surface makes for clean, precise and fast filing. The material is very durable and this file will last a very long time. Diamond files work on both strokes, back and forth. It will leave a smoother surface without chattering.