A Whetstone wears unevenly during knife sharpening; this cannot be avoided, even with high-quality sharpening stones such as the WÜSTHOF Whetstone. The Flattening Stone ensures that unevenness is levelled out again and that, over the long term, an effective sharpening result is maintained.

• 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.