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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?

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 ...

Keep your drill bits cutting like new with the Drill Doctor ($129, Model 250), the first affordable drill-bit sharpener that gives professional results. The electric sharpener uses a diamond abrasive ...