Sidecut Diamond Disc help remove burrs, sharpen and polish skis. The benefits of Diamond Discs compared to traditional rectangular stones is simple: they last longer because you can easily spin the disc, thereby using every bit of the Diamond surface. Whereas with a rectangular stone you'll get a continual linear wear area that can't be reached on the File Guide.
Tip: It's best to have at least two Diamond Discs - 1 x 120 or 200grit and 1 x your choice of 400, 600 or 1000 grit. If you're using this as a stand alone edge tuner and choosing only one disc, we recommend a 400 grit disc.