If you’re considering an electric drill bit sharpener that allows you to get the most out of your old drill bits, the Drill Doctor 750X deserves a close look. It works with bit sizes from 3/32 ...

In this case, testing drill bit sharpeners. There are also lots of videos on youtube about manually sharpening a bit, though there's a bit of skill involved there.

The Drill Doctor 750 X model is used to sharpen standard steel twist and masonry bits from 3 mm to 19 mm and offers custom point angle sharpening, set to any angle from 115° to 140°. It features ...