Japana STEEP 2 VARIABLE EDGE SHARPNER This is a tool for sharpening the side edges of skis and snowboards. The edge angle is adjusted with a screw. It can be set to 88.5 degrees, etc. I used it to repair areas with burrs on icy patches or when stepping on stones when applying WAX. I have not used it for purposes such as changing the side angle. Although it is used, a file of the same size is included. I think it's good to use it separately for rough cutting and finishing. The screws turn normally without any sticking. Please check the photos carefully before purchasing as this is a used item.