After receiving my 10" Edgetek triple grit sharpener I started with my small pocket knife. After a few strokes using all sides I had a super sharp, better than new blade. Then I went to my large Buck nighthawk with factory edge and honed it into a scary sharp yet durable edge. This is by far the best,easiest to use sharpener I've ever used.
I bought this sharpener about a year ago and I am happy to report that I am incredibly happy with it. I have not met a knife that it wont sharpen and when it sharpens them its enough to shave the hair off my arms. This is an expensive sharpener but it is well worth the money I promise.