Buy one, keeping your knife super sharp 400Grit Side: This coarse grit is highly recommended for very dull edges on knives and tools. Whether you're refining a worn edge or establishing a new bevel angle, the coarse grit is the grit to accomplish this task. 1000 Grit Side: This grit is a very good overall grit. It is fine enough for many jobs and still have enough abrasive properties to do sharpen knives and tools that are not very dull. If you keep your knives and tools in good shape, you'll find yourself reaching for this grit level often. This grit is also very common for the final stage for many kitchen knives. How to use: 1. Soak the sharpening stone into water for 5 minutes, then put it on a steady surface such as a table or a desk. 2. First use the #400 grit side for fine grinding in 10~20 degree angle, push the knife out with a little force, and then gently retracted. This process takes about 15 minutes. 3. Then use the #1000grit side to polish your knife, don't force too much. This process takes about 10 minutes. 4. After sharpening the knife, clean the knife with wet cloth or water, then dry it. 5. Use a soft brush to clean the sharpening stone, then placed in a ventilated place out to dry. Attention: 1. Do not only use the middle of the sharpening stone, please make full use of the surface of the whetstone. 2. Do not use whetstone to sharpen serrated blades and ceramic knife. Specifications: Material: White Corundum Color: White + Green Dimension: 7.0"(Long) x 3.15"(Width)x 1.1"(Thickness) Grit size: 400grit (Green Side), 1000grit (White Side) Weight: 21.15oz
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