Diamond stones have the special quality of having the cutting ability of a file and the deburring and polishing ability of a traditional stone all in one tool. Convenient as an on the hill quick tuning tool as well. The special Swix diamond pattern gives these ski tuning stones an excellent cutting and polishing ability as well as added longevity. Use the coarser grits to get through the hardening that occurs during manufacturing or after hitting rocks. The finer grits are great at de-burring and putting on a smooth, sharp finish to ski edges.