I think BassCat meant Air Impact Wrench. Make them tighten the lugs by hand with a
lug wrench and then torque the lugs to 90-100 ft lbs with a torque wrench. If they use an air impact wrench upon installing, there is a good chance that the lugs will be over tightened. If they are over tightened, the lugs can stretch out due to metal stress or heat (brake axle), fail and you will loose a wheel(s),...