Reply by MrRon

I know how to sharpen drill bits by hand and still do so with bits larger than 3/8”. For smaller bits, the DD works very well. You can’t sharpen carbon steel bits, only HSS bits. I don’t bother with bits smaller than 1/8”. They are cheap enough to toss. The one I have, I paid less than $40 and sharpens up to 1/2”. I wouldn’t spend more than that for a sharpener.