Protect your investment in fine Shun cutlery and keep your edges razor-sharp with this combination whetstone. It combines medium to medium-fine whetstones: 1000 grit on one side, 3000 grit on the other. The 1000-grit side will restore a dulled edge while the 3000 grit side will refresh the edge. This whetstone must be thoroughly soaked before sharpening.