The angle needed to sharpen a pocket knife depends mainly on what you plan to use it for. Pocket knives and those used to hunt should be sharpened at 30 and 22 degrees, respectively, to get the best out of them. While for kitchen knives and filet knives, 20 degrees angle is the best option. So, you need to be clear with what you want to use your knife to know what angle is best for sharpening.