Knife sharpening that still works in General Discussion Posted November 24, 2012 I use a hand held diamond steel.. It will flat out lay a razor sharp edge. I have a store where I sell windows and doors. To pass the time on slow days I sharpen knives. I charge 3 bucks a pop. Some that come in are really doinked. I will hit them on my wet grinder to get em refined. Then work the edge on a few different sets of diamond steels.