For raw power and torque, I go to my battery powered 1/2" drive impact every time now. When I had a customer with multiple stripped/cross threaded wheel studs, the battery powered impact made quick work of a terrible job. I simply put it in forward and power level 3 and it snapped off the 9 1/2" wheel studs in 3 to 5 seconds each. With 1100 ft. lbs. on tap, they never stood a chance. My Snap On 1/2" drive air powered impact would have been beating on those studs for an hour!
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