The archimedes drill http://www.cooksongold.com/Jewellery...prcode-999-330 is similar to a bow drill in that it uses person power and not electricity to move the drill bit. It takes pretty much forever to make a hole with an Archimedian drill, the bow drill is much speedier. I've heard others praise the Proxxon too. I know there are cheaper out there, but from the hours I spent researching bench drills and reading reviews before coming to my financial senses the Proxxon comes out tops.
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