Originally Posted by Mike

you could do it with a regular long bar socket wrench, but you would need a helper stepping on the brakes and your muscles would get really tired.
The ends of the bolts are knurled, and are normally pressed into the hub. When you install them after initial assembly, they are pulled in with the impact wrench, or you could pull them in the same way manually, but you are putting a the stud into a slighly smaller hole, hence the getting really tired part.