Just received my Drill Doctor 750 yesterday and sharpened 10 drills from 1/4" to 3/4 inch. Works fine. Some drills were off angle enough that I had to grind, reset the carrier length, and grind again. With my lousy eye sight this thing will finally allow me to re-grind bits to factory standards. MSC special $129. Enco special $119 This month. Chuck