Wusthof sells a variety of products for maintaning a good edge. When picking a sharpener, you should chose one that you are comfortable and experienced with. Although some chefs can achieve a razor sharp cutting edge on a sharpening stone, many consumers find themselves with less than average results. Pull through sharpeners are great for weekly maintenance and are the easiest to use. JustKnives101 is also factory authorized for sharpening of Wusthof Trident Cutlery.