This file is used when your ski or snowboard is no longer sharp, or when you want to sharpen a new sidewall angle.
This medium file is not really coarse, but not really fine either. It is an ideal all-rounder for maintaining your ski and snowboard yourself without having to file away too much steel. Always use this file in combination with a edge grinder so that you can grind an equal angle over the entire length.
Of course you can also use this separately to file your base edge, so that any rust or burrs disappear.