How in the world??

it is an 11 mm 12 point socket. i am able to get them when i go straight at it. if not, i use a wrench and hammer. you can get 2 at a time, then rotate the DS half a turn. put the e-brake back on.
 
man i remember taking the factory ones off....car was on jackstands and a breaker bar with long piece of pipe to stand on was needed to break them loose.

Just get new ones with thread locker already on them and tighten em down with an impact wrench or jack the rear of the car up. I've jacked the rear of the car up, then set the rear tires on ramps. Keeps the ds from turning and you can get a tq wrench under there.