Medium/Fine Abrasive Belts are intended for final convex sharpening of a knife or tool edge. Work Sharp’s special Norton NORaX alumina oxide formulation creates the finishing stage of refinement once you edge has been established. These are an exact replacement for the Medium/Fine grit included with the Ken Onion Edition Knife and Tool Sharpener belt assortment. Gray X22 Medium 1000 Grit. Includes 5 belts. For use with the Work Sharp WSKTS-KO Ken Onion Edition Sharpener. Made in the USA.