These tools are custom made in the UK by Crimson Guitars and are based on some of the finest files in the world and made to traditional design.
We have two designs of fret end dressing files, the square and rectangular. The square is daintier and that is pretty much the only difference. The teeth are much finer than the traditional crowning file as this tool is designed to get right up close to the fretboard as you dress the fret ends perfectly. Two sides of the file are ground smooth and polished and then one edge is slightly rounded over and ground 'safe' so you can angle the file without worrying about damaging your fretboard. The other side is left with teeth right up to the square edge so that you can file away the last little nib of fret end that always stays behind when using other tools.
The tutorial video below shows how to use the various fret crowning and fret end dressing files we make.