Next on the pre-purchase checklist is determining the diameter size of the drill bit needed for your job. If it needs small or average holes, 1/4-inch or 1/2-inch bits are perfect, but if you need ...

This low-priced sharpener puts a fresh 118-degree grind on any old, dull drill bit. The diamond sharpening wheel works with standard 3/32-inch to ½-inch twist drill bits made of any material.