whetstone,Sharpening Stone Knife Sharpener blade,edge,cutlery. whetstone,Sharpening Stone Knife Sharpener blade,edge,cutlerySharpening instruction:1. Soak the stone in the ... .Step 1: 600 grit coarse grinding, used to give knife edge or repair the seriously damaged edge, suitable for blunt ... knives.Hold the knife at an angle of 10 - 30 °, grind the edge ...