Features: High-grade whetstone water stone for effective sharpening results. Double-sided sharpening design. Equipped with silica gel non-slip base for safe sharpening. Widely used for knives, scissors, hand tools, woodworking tools, carving tools, etc. Using instruction: Soak the stone in water for 5-15 minutes, then put it on a steady platform. Sharpen knives with one or two steps depending on the degree of bluntness. Step 1: Coarse grinding for seriously damaged edges. Hold the knife at an angle of 10-30 degrees and grind the edge on the stone's surface with gentle pressure. Step 2: Fine grinding to eliminate burrs. Use gentle pressure and repeat step 1 until the edge is smooth and keen. Clean the stone surface with a soft brush and dry it after use.