1、2 SIDE SHARPENER: The 400 grit side is suitable for any daily sharpening, such as repairing large edged knives and polishing knives, 1000 grit will help you make your knives smoother after using 400 grit 2、FAST AND EFFICIENT: Grinding stone pulping speed is fast, the self sharpening is high. Therefore, trimming is not very frequent, which can improve work efficiency 3、WIDE APPLICABLE: The sharpening stone is compatible with a variety of knives, including chef's knives, hunting knives, pocket knives, Japanese knives, butcher knives, paring knives, barbecue knives, scissors, chisels, blades 4、MULTI FUNCTION: Knife sharpening stone set can also be used for axes, hatchets, carving and gardening tools, very versatile and practical 5、STABLE AND DURABLE: Knife sharpening stone set come with stable structure, excellent performance and long using time