This drill bit sharpening set was one of the few that came with 60 grit discs, leading me to believe it could do heavy-duty sharpening - the spot of the base wood (the grinding mouse is too big). On the other hand, with its wobbly turning movement, it was completely useless, uncontrollable, especially at the edges. Maybe it's good for fine grinding and polishing, but it can't handle anything more substantial.
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