I've been thinking about buying one of these but I don't know if they are just a gimmick. Also, if they genuinely work well how good do your bits need to be in the first place to be worth sharpening?

We may receive a commission on purchases made from links. You can tell a dull drill bit more or less immediately. If you're drilling wood, you'll likely see thin wisps of smoke as it starts to burn.

A collection of woodworking drill bits ready to be sharpened - Vladyslav Varshavskiy/Getty Images The tool has a ⅓-horsepower motor driving two grinding wheels at up to 3450 rpm. The wheels have a ...

An image of a man grinding a drill bit on a bench grinder - Best_Stocker/Shutterstock We may receive a commission on purchases made from links. If you're a ...

Dull drill bits are not usually a type of tool that's worth buying used, unless you can sharpen them yourself. Many companies that sharpen drill bits use precision grinding machines, but there are ...

Drill bits are so cheap that when one is too chowdered up to keep working, we generally just toss it out. So you might expect a video on sharpening drill bits to be somewhat irrelevant, but [This Old ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Drills and drill bits are an essential part of every handyman's toolkit, and for good ...

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Two Houston-area men have received a U.S. patent for a new kind of drill bit they say will sharpen itself. The "self-sharpening" effect is achieved by the configuration of hardfacing material in the ...