This extremely useful drill bit sharpener fits all drills with a 43mm collar and a keyed 13mm chuck. Suitable for 3.5 - 10mm HSS drill bits. Made with a built-in drill bit guide which ensures sharpening at the correct angle. In a matter of no time at all this handy tool gives blunt drill bits a razor sharp cutting edge. The tool even comes with a replacement grinding stone! Get your quick and easy to use drill bit sharpener today!