The grinding speed is extremely fast: this diamond sharpener uses diamond as an abrasive. The diamond particles are very hard, which is more efficient than ordinary sharpening stones, and the sharpening speed is faster. Coarse grinding and fine grinding: contains 2 sharpening stones, you can use the 400 diamond wheel to grind rust on the tool, and 1000 to make the blade sharper. It is recommended to start coarse grinding with 400 first, and use 1000 for fine grinding. Small and light, easy to carry: the size is 15 x 6.3 cm, the thickness is 2mm, small and light, very suitable for carrying. The diamond sharpening plate can also be used as a sharpening stone in the kitchen or garden. Multiple uses: grind the cutter on the diamond plate to sharpen the surface of the stone back and forth at an angle of about 30. For best results, use water or sharpening oil. Suitable for household kitchen scissors, scissors, blades, carving chisels, wood chisels etc. Care Note: The sharpening process will cause the whetstone to wear in a some extent, which is normal. After use, please place the whetstone in a clean and dry place to prolong the life of the whetstone. Product Features: Combination of Coarse Grinding and Fine Grinding: This set contains 1 coarse polishing whetstone grit 400 and 1 diamond grinding wheel grit 1000. First, coarse grinding is done for polishing, then fine grinding is done to make the tool sharp. Diamond Grinding: Grinding tools with diamond particles, fast speed and high efficiency. However, sharpening the cutter will cause the diamond sharpener to wear to some extent, which is normal. Usage: The cutter is placed on the surface of the sharpening stone and held at an angle of about 30 to grind back and forth. If necessary, use water or abrasive liquid for best results. Store the diamond sharpening plate in a dry place after use. Use: The diamond sharpener can be used to sharpen kitchen knives, engravings, hunting burrs and other tools. Product Features: Dimensions: 15 x 6.3 cm. Quantity: 2 pieces