M7 QE-333 air drill and driver for drilling holes and fastening screws 3/8 keyed chuck helps prevent slippage and adds torque to the bit 0.65 hp motor delivers 1,800 RPM free speed without load The planetary gear motor increases torque to balance the load Convenient forward reverse switch provides quick direction change Mighty Seven QE-333 m7 3/8" DR REV DRILL WITH KEY CHUCK