Feature:1. Light and easy to carry, double sided grindstone with high efficiency and stable working performance.2. Good wear resistance ability and easy to maintain its shape well, convenient and easy to use.3. Easy to sharpen and grind all kinds of precise tools, sharpen and grind precise parts and so on.4. Watchmaker and clock repairman's professional tools, exquisite watch repair accessories.5. Widely used for the maintenance of watch tools, can also be used for the maintenance of other tools.Specification:Item Type: Sharpening GrindstoneMaterial: Oilstone Size: Approx. 10 x 2 x 1cm / 3.9 x 0.8 x 0.4in (Length x Width x Height) (manual measurement, please allow a little error)Application Scenario: Widely used for the maintenance of watch tools, can also be used for the maintenance of other tools Package List:1 x Sharpening Grindstone