Package included: 180/400/800/1500/2000/3000/5000/10000 Grit Suggestions: 1. When using a corundum stone, put a few drops of honing oil on it first. If honing oil is unavailable, kerosene, lubricating oil, or cooking oil can be used instead. 2. When using a natural stone, please drip water on it instead of oil. 3. The better angle when sharpening the knife is 10-20 degrees. 4. Please do not rub the pulp off when sharpening. If your knives are rusted, you can use sharpening stone to get rid of the rust. 5. After use, please wipe off the pulp and place the stones in a dry environment, avoid high temperature and damp. *In this way, the sharpening stone will not produce dust easily during use, resistant to wear and long lasting.*
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