Grayne Professional Precession Ski and Snowboard Edge Tuner : If you demand a professional level precision edge on your skis or snowboard, the Grayne Edge Tuning Kit is a must-have. This 8-piece complete edge tuning kit come with everything you need to get your ski and snowboard edges better than they were straight out of the factory! The fully adjustable edging tool allows you to precisely customize both your base and side edge. Simply set the dial on the back to your angle preference (adjustable from 85-90 degrees), then choose your base edge angle (0.5-1.0 degree) to find the precise fit for your riding or skiing style. Four different edge files will take your edges, in sequential steps, from rock torn and jagged, to a brand-new factory polished finish. The gummy stone will deburr edges, allow you to detune your tips, or it can be used to simply remove minor rust in-between sharpening or after storage. Use the included micro brush for cleaning your files, so you are always ready for the next tune. This staged process will leave your gear with a professional finish and precision tuned edges for peak performance on the slopes! Grayne includes a compact carrying case to keep the kit together and on hand so you can make sure your edges are always perfect.