The WÜSTHOF Whetstone 1000/4000 consist of a combination of different high-quality, abrasive grits. The stone has two sides – one with a fine grit and one coarse. The coarse side is used to smooth off any unevenness while the finer grit is used to hone and sharpen your knife. Care Instructions Before using your whetstone, be sure to soak it in water to ensure it stays wet while sharpening knives. Always use the entire surface of your whetstone. After use, rinse under running water and leave to air dry. Use the whetstone’s holding tray to store it. We recommend a box to protect your stone when not in use. If necessary, use a rubbing stone to roughen the surface and remove any unevenness. Specifications Production SKU: 3069720101 Country of Origin: China Cutlery Type: Whetstone incl. non-slip holder