To ensure that your knives stay beautifully sharp, use your honing steel regularly. If your knives get blunt, they can be sharpened again using a diamond or ceramic sharpening steel. If you would rather not use a steel, you can use a WÜSTHOF knife sharpener instead. A particularly gentle and effective way of sharpening knives is to use a whetstone. WÜSTHOF whetstones consist of a high quality combination of various abrasive grits. The stones are made from silicium carbide and high-quality corundum.