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Battery operated rotary tools
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I have a Dremel model 770, which is a 7.2v tool with two speeds (something like 10,000 and 20,000 RPM). I immediately bought an adjustable collet that Dremel also sells, and it fits 0 - 1/8" which obviously makes it very versatile. I actually love using it to drill grab iron holes because I can maneuver it every which way without getting tangled in the cord, and it's pretty lightweight so I can control it very well. The low speed is technically still somewhat fast for drilling plastic, and I do sometimes have to stop and clear some molten material off the bit, but the overall process of drilling holes goes so quickly that I don't touch pin vises anymore unless I really can't get the Dremel into an odd location. <br /> <br />It does sometimes run out of juice when I'm doing heavier work, like grinding away at plastic or metal, although it'd be less of a problem if I had a spare battery. In those cases I usually switch to a corded tool because portability isn't much of an issue, but torque and current draw are.
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