Designed to maintain the Japanese-style 15 blade edge of Signature & Professional kitchen knives. This sharpener features an advanced ceramic wheel, and a solid plastic handle with weighted non-slip base to give you the quickest and easiest way to sharpen our knives. Use regularly to hone the blade edge back into shape. The clear plastic guard will protect the replaceable ceramic wheel, which is positioned at the optimum sharpening angle for the Signature and Professional range of knives. Whilst specifically designed for use with the Signature & Professional range of knives, this hand-held knife sharpener can also be used to maintain and sharpen the blade edge of other plain edge kitchen knives. Please note that serrated edge blades should not be sharpened with this product. Hold the sharpener firmly on a flat surface when sharpening. 10-12 strokes from heel to tip of the blade applying gentle pressure, maintaining the blade edge in continuous contact with the wheel on a regular basis will keep your blade edge in optimal condition. Wash and dry knife before use after sharpening. We recommend that after 6-12 months, depending on frequency of use, you change the ceramic sharpening wheel in order to maintain your knifes cutting edge to a high standard. Replacement wheels are available individually or as a special offer set of two.