Sears has 6pt 1/2" drive impact sockets.
3/4" drive is over kill for the application.
12pt will screw up the covers eventually.

 

My covers are already screwed up due to the tire guys and their impact wrenches. I had to use my 3/4" drive wrench as none of my other breaker bars would give me enough torque. I had my torque wrench set at 300 lbs and it clicked way before the lug nut let loose, so it was on there at probably 400 lbs.

 

One of the best reasons for a second set of mounted tires is so you never have to let the tire shop put your wheels back on your car.