Master Palm® Pneumatic.
Master Palm small mini twin hammer impact wrench, 1/2" square drive with Max. 650 ft/lb torque is lightweight designed for quick tire exchange.
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Lightweight mini impact wrench with 3 pounds net weight. Patented oil inlet design increases 3 times of impact tool life span if you oil the wrench once a week. The 5 sec turbo torque can reach up to 420 ft/lb ( 569 Nm ). The max torque is 650 ft/lb (881 Nm). The low pneumatic air consumption is about 2.5cfm (22.5 scfm / 637.4 - 1/min)
Master Palm Mini Light Weight Impact Wrench, 1/2" Square Drive, Max. 650 ft-lb With Quick Torque At 420 ft/lb ( 569 Nm )