Hedge trimmers' cutting blades are made from high quality, hardened steel and with normal usage, they will not require sharpening. However, if you accidentally hit a wire fence, stones, glass or other hard objects, you may put a nick in the blade. There is no need to remove this nick as long as it does not interfere with the movement of the blade. If it does interfere, unplug the unit and use a fine-toothed file or sharpening stone to remove the nick. If you want to sharpen the entire blade, you can do so by hand using a round file. We do not recommend using a power tool to sharpen the blade. You will also need to file each side of each tooth. It's also necessary to keep safety in mind when sharpening- unplug the tool or disconnect the battery. Wear heavy cut resistant gloves and eye protection. Just keep in mind for the sake of time and labor it may be easier just to replace the entire blade. Our service centers also do not offer sharpening service.