Product descriptions: You will sharp knives in a few second with it; the product is durable and solid, save time, convenient, and fast. The knives stone device is a kind of new, convenient and practical household product. Round knives stone It is made of special plastic. You can put knives on the device; only need several seconds can sharpen the knives. No matter how blunt knives it all can sharpen it in only about half a minute. Features: The knives stone device is a kind of new, convenient and practical household product. Each family all needs it. it is necessary product on modern family. If you do farm work, one or two hours, the sickle is blunt, it is very hard to move traditional knives to farm field. Now, the knives stone is not over than 50 g. Put it in the pocket, you can sharpen the sickle any time. It is very convenient. Specifications: Material: Plastic, Sharpen stone Size: Diameter is about 4 cm(1.57''), Height 4.5 cm(1.77'') Manual measurement, might a little error Package include: 1 pc Whetstone The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.