Q: What is the radius of the underside of the B-File?  What if my fretboard radius doesn’t match the radius of the B-File?

A: The B-File has a 9.5” radius on the bottom side.  Even if your fret board radius differs from 9.5”, the radius allows the bevel file to stay centered and balanced on the fretboard while filing, providing consistent results throughout the length of the fretboard.