For use on Drill Doctor Models 400/500/750 - sharpens 1/2" - 3/4" drill bits. The wheel has three layers of nickel/diamond plating to provide long life. If you sharpen mostly large bits (1/2" or larger), this sharpening wheel will sharpen your bits faster, with fewer turns.

For use on Drill Doctor DD750 Professional, DD500 Tradesman, and DD400 Journeyman.

Not for XP or X Model!