Master Palm® Pneumatic.

Master Palm mini impact wrench, 1/2" square drive with Max. 480 ft/lb torque, is light weight with jumbo hammer and steel motor, using  the jumbo hammer that delivers an instantaneous balanced blow and reducing vibration to transmit more torque to the end of the drive. 3.9" in width with 3 lb weight. 3 position control for forward and reverse.