KAW1139 Features: * Air impact wrench with twin hammers * 0.52" air impact wrench generates 275 ft. lb. of torque * 5 Speed settings * 7,000 RPM free speed * Requires 90 PSI input Dimensions: * Dimensions: 8.13"" H x 11.13"" W x 3.38"" D Warranty: * One year warranty