wiht mine I notice that I have to really pay close attention to how the file is laying on the bevel,, its wierd I guess because if I feel the file actually "shaving material" I'm doing it wrong,,,, It has to feel like the file is just sliding down the bevel and not doing anything. after about 20 passes like this on each side I follow up with a DMT pocket extra-fine diamond file doing the same thing from back towards the point and thats about as sharp as they will get for me but they are very sharp.