Sharpening kits are similar to pull thru sharpeners, in that they help take the guesswork out of sharpening. But unlike the pull thru sharpeners, they offer a superior edge. Once set up, sharpening kits can get you that razor edge without being a sharpening expert. They come with a variety of options and range from simple to more advanced set-ups. If you have trouble sharpening on stones, this might be the route that works for you.