Yes, Jiffy® Power Ice Drill blades (cutting teeth) can be re-sharpened, but must be taken to a service dealer that does blade sharpening to maintain the precise factory angles. It's wise to keep a properly sharpened or new spare blade on hand. It’s also important to maintain the angles that were ground at the factory. Never try to re-sharpen hand ice drill blades. Once these hand blades start dulling, you must purchase a new set.