THis one shows the 8 MM allen wrench hanging out of the rear bolt holding the shims in place. It wasn't too hard to break all four of the bolts (I removed the shims from the front only). As noted earlier, you only have to remove the rear two. The front two only have to be loose. The stand-alone 8 MM Allen worked fine, although it is a bit awkward getting a good grip, and there is a very limited field of motion. A socket 8 MM would have been a lot faster.