I was amazed to find out that this 12 volt impact wrench actually works despite it looking like a Fisher-Price toy.
I picked it up at (cough)*Mart to speed along the caliper painting project. I didn't expect much from a battery powered pile of plastic, but I couldn't have removed or installed the lug bolts with a standard lug wrench as fast as I did with this thing. It has a 1/2 inch drive, claims to have 250lbs of torque, and I got it for $30 from the big blue store that all cheap crap comes from. I figure it will be a good thing to have on hand when I need to change a tire quickly in the field.