The WÜSTHOF 400/2000 Whetstone consist of a combination of different high-quality, abrasive grits. The stones have 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. 

• 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.