[jshillin]

Originally Posted by Stryder

Both. What about this model? The specs says it has a max torque of 450 ft. lbs.

RIDGID 1/2 In. Heavy Duty Impact Wrench - R6300 at The Home Depot

You always want more than what you need.... Something might only be torqued to 100 ft/lbs, but a bit of corrosion or thread locker makes that almost impossible to break loose. You can always turn it back a notch or not hammer it when putting fasteners on, you need all of the torque to remove things.