If you are talking about ripping computers there is nothing better then the high speed assembly screwdrivers mounted above your workbench on a spring ballancer. Faster then any cordless and most corded screwdrivers, ergonomically correct. On a ballancer it is weightless, you actually have to pull down slightly to get to your work. No wrist pain. I got 2 of them off ebay for $50-$75 each... just gotta watch for them. Here's a pic of mine waiting for more work tonight.
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