Your typical ratcheting screwdriver lets you twist the handle in both directions, but only drive a screw when turning clockwise. With the
Kobalt Double Drive, holding the ratcheted collar lets you drive a screw no matter how you twist the handle.
More » Source: http://feeds.gawker.com/~r/gizmodo/full/~3/zGaSTkxrmTk/double-drive-screwdriver-means-righty+tighty-and-lefty+tighty-too
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