We have Thorsen 34-346 1/2-Inch Drive Impact wrench with Product Detail Max.torque 553 ft/lb Twin hammer 8000 rpm 4-10 cfm air consumption 90psi . The "Thorsen 34-346 1/2-Inch Drive Impact wrench" is best product for you. We recommended Thorsen 34-346 1/2-Inch Drive Impact wrench