This new tool is really quite brilliant. Whether you are driving or retracting screws, the rotating handle will turn the driving bit in the same direction on both the clockwise and counterclockwise rotations. The result is twice the driving speed - a great plus. You simply select the bit's direction of rotation (to drive or retract screws) via a slider switch, and then rotate the handle back and forth with your wrist. This double action makes for a truly amazing tool. The full complement of 20 precision bits includes 4 slotted tips (1/16 to 1/8", 4 Phillips #000 to #1, 8 Torx and 4 Pozidriv.