Built For Power And Speed The Milwaukee 0779 1/2" Impact Wrench delivers 325 ft. lbs. of maximum torque. It's powered by the company's exclusive 28-volt Lithium-Ion battery pack. Combining high torque with 1,450 rpm and 2,450 ipm, the 0779 provides the power, speed and run-time to drive larger lags, drill bigger holes and remove larger nuts. The heavy-duty magnesium mechanism housing provides added durability. Comfortable non-slip, soft-grip surfaces reduce vibration and fatigue.