Emery cloth holder for ski and snowboards

This is a holder for sandpaper designed to hold special "metal" sandpaper used to remove "grates" / "burrs" on steel edges of skis, prior to filing. In danish this is called "smergellærred", in english, I believe it is called "emery cloth".

There are a number of ways to remove the burrs, which are often too hard to remove for the files. In my experience, emery cloth is the easiest to handle. What I have been doing until I printed this model was to put the emery cloth between my file and the e