Today I went to change the brake pads on my car, and i got everything off that i needed to and all, but after that i put the new pad on and i coudlnt get the unit htat squeezes the pads to fit over the new pads. My neighbor told me that a C-Clamp would work and I would be able to push the little circle thing (i guess it might be the piston) that pushes the pads on to squeeze back in so that i could slip it over. Well that thign wouldnt budge with a clamp so now i cant fit the unit in over the pads. Sorry I'm pry not using the correct terms, i dont know much about brakes, can someone help me that has done this before? Thanks!