the idea hit as I picked it up...Why not a brake caliper, piston squeezer inner tool? I had seen the factory tool pictured in the Haynes manual and without this I was afraid I might turn the piston adjusting screw and strip the thread or bust an Oring, if the piston was stuck in any way.
The V part of the pliars are thin and steel and expand Outwards when they're squeezed. I pulled one brake pad (installing new rotors at the time), inserted the tool, and with just a little slow pressure, turned the adjusting screw and the piston went into the caliper no sweat.
A highly recommend tool for garage mechanics!
Do You have any new tool to add to the list of stuff we all need??