To finish an edge tune on your skis, make sure you use the Swix Diamond Stone Fine File. This 600 grit file is ideal for fine polishing, or removing tiny burrs from the edges of your skis. To optimize the performance of this fine diamond file, use it after diamond stones with coarser grits. The grit on the Swix Diamond Stone Fine File is perfect for finishing the edges on technical skis. This product is best used with water. When you want a professional finish on your ski edges, but don't want to pay an arm and a leg, use this economy option from Swix.