Satake Japanese Wet Stone 1200 Grit from Satake is perfect for maintaining already sharp knives. For best results, use it with a coarser stone of at least 3000 grit. Whetstones are graded according to grit, or degree of fineness, depending on the purpose of the grinding. Satake sharpening stones are color coded to easily show which grit they have, and the packaging matches the color of the stone for easy identification.