For sale is a Chicago Pneumatic Heavy Duty Electric Wrench. Unit is marked: DAO 0761 (this is probably the serial number). 1" Square driver. 1/60/120V, Single phase AC input. Geared head construction (I think this wrench has a set of double-reduction gears inside). Low speed; very high torque. I have performed a basic test on this tool; it runs well and sounds very good. Comes with threaded pipe section for use as a second handle. Approximately 40 pounds net weight.