Replace the wheels with the Minosharp 220 water wheel sharpener to keep your Global knives sharp. This kit includes a white wheel for coarse sharpening and a pink wheel for medium sharpening. Note that it is only suitable for double-edged knives and not for serrated or single-sided knives. For the best results, use the coarse wheel for heavy sharpening and the medium wheel to maintain the edge. The Minosharp replacement wheels are the perfect solution to keep your Global knives in optimal condition.