Cordless Impact Wrench 1/2 inch for Dewalt 20V Battery, 600 Ft-lbs (810N. m) Brushless High Torque Power Tool with LED Work Light and Belt Clip (Battery Not Included) - Amazon.com
DeWALT 1/2 in. Drive 600 ft./lb. Impact Wrench at Tractor Supply Co.
1/2" Air Impact Wrench, 600 ft/lb, 7500rpm | Tool.com