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FSYAO 18V 1/2 inch cordless impact wrench-brushless, 350 ft-lbs maximum torque, 4-speed adjustment, automatic start and stop.(Main unit only, no battery). - Amazon.com
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Milwaukee 1/2 in. Impact Wrench with Rocker Switch and Detent Pin Socket Retention 9070-20 - The Home Depot
DEWALT, 345 ft-lb Fastening Torque, 345 ft-lb Breakaway Torque, Impact Wrench - 4JB74|DW293 - Grainger
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