Product 1. Before sharpening, soak the whetstone in water for about 5 minutes, then place it on a stable surface such as a table or desk. 2. First use the coarse grinding surface ( 400 grit) for rough grinding at an angle of 10-30. Push the knife with a little force, and then gently pull it back. This process takes about 15 minutes. 3. Then use the fine sanding surface (1000 grit) for fine sanding. This process takes about 10 minutes. 4. After sharpening, wipe the whetstone with a damp cloth or rinse with water and air dry. 5. Use a soft brush to clean the whetstone, then place it in a well-ventilated place. Feature 1. HIGH QUALITY DOUBLE-SIDED GRINDING STONE: the rough grinding surface (400 grit) quickly sharpens dull or damaged ones knives with just a few moves; the finishing surface (1000 grit) is ideal for finishing and buffing the edges, and perfect for light touch-ups to a ready sharp 2. EXCELLENT SHARPENING AND SANDING PERFORMANCE: Sharpening stone is made of professional corundum, corrosion-resistant, heat-resistant, edges and corners are clearly defined 3.400/1000 GRINDSTONE IS SUITABLE FOR MOST GRINDING OPERATIONS: e.g. tool steel, hardened steel, tools, knives, scissors, chisels, axes, Kitchen Knives, Cutting Class Knife Sharpening, etc. But Except Serrated Blades and Ceramic Knives, etc 4.ENSURE SAFETY SHARPENING WITH NON-SLIP SILICONE HOLDER: The non-slip silicone holder keeps the sharpening stone securely in place, so you never have to worry about the whetstone 5.DOUBLE-SIDED WHITE STONE: Sharp silicic water stone is made of high-strength silicon carbide double-sided grain 400/1000. Grit 400 is used to restore the edges to their original shape. Grit 1000 is used to sharpen and smooth the edges. Flattening Stone is used to level and flatten the uneven surface caused by repeated use. Since it is a water stone - no expensive honing oil required 6.100% SATISFACTION GUARANTEE NO RISK We are sure you will love this whetstone. Try it risk-free today. PACKAGE 1 x Sharpening Stone 1 x Rubber Holder 1 x Bamboo Base