Protect your investment in fine Shun cutlery and keep your edges razor-sharp with this combination whetstone. It combines fine and extra-fine whetstones in one: 3000 grit on one side, 6000 grit on the other. Use the 3000 grit side for restoring a slightly dulled edge; use the 6000 grit side to refresh and polish the edge. This whetstone must be thoroughly soaked before sharpening.