Agree 100% with Steve's answer.
Didn't know a cab co. would do that.
We've noticed lately that a certain tire chain (no names S) has been using inpacts to tighten the lugs down (or just the opposite and can tell you a horror story or two about that!). This is not an acceptable way of doing this. I do realize that in our profession speed and time is money (especially if you are flat rate) and there is certain ways to speed the process up but not this way. It's alright to use a inpact gun or air ratchet to snug them down and THEN use a torque wrench.
As steve pointed out, over torquing (and not using the correct tightening sequence) can cause a lot of damage, not only to the wheel/rim but the studs, and brakes.
(Sorry to ramble)
If you do not have an inpact gun to loosen the nuts up, and do not have a four armed lug wrench, try like steve said with a cheater bar or if you have a good 1/2" (or bigger) ratchet set with a good sized breaker bar use that.