Whetstone for home use series is designed for ease of daily use at home. Two different grinding whetstones are combined to sharpen Japanese knives easily for everybody. This is the combination of the Middle grinding (Abrasion of big scratch and smoothing blade tip) and the Finishing grinding(Abrasion of all scratch and sharpening blade). Just turning it over to change the grit number.
If handling of knives is not correct all matters like bite of knife and brilliance would be lost.
Ceramic Sharpening Stone#1000/#3000grit