Moonflex is the revolutionary diamond file which allows a quick and easy sharpening of your ski edges(or snowboards or speedskates).Manufacturer: Sorma Description Moonflex Diamond Files are the leading diamond files for ski servicing. Produced by Sorma in Italy, the files consist of a special material coated with industrial strength diamond particles. This makes diamond files extremely good at cutting all materials including glass. Moonflex files are mounted on a flexible plastic base to allow the file to follow the shape of the ski or snowboard edge.