1、PREMIUM MATERIAL: This knife sharpening stone is made of high quality jade, high hardness, very strong and durable. 2、SIMPLE OPERATION: Beginners can easily set their cutters at the correct sharpening angle, easy to get started; makes everything very easy. 3、EASY TO CLEAN: Professional sharpening whetstone, sharpening only needs water, easy to clean, ensure food safety and delicious. 4、PRACTICAL AND EFFICIENT: With just one use for lasting sharpness, the complete whetstone kit is available for all your sharpening needs. 5、APPLICATION: This sharpening stone is suitable for household kitchen knives, scissors, chisels and axes or other tools that require sharpening. 1 x Sharpening Stone1 x Silicone Cover Item Type: Sharpening StoneMaterial: Jade, SiliconeSize: Approx. 5 x 20cm/ 2.0 x 7.9inBoron Carbide, Natural White Jade, Natural Green Jade