So today I was pretty pumped up about changing both brake rotors and pads to eliminate the steering wheel vibration when braking at high speeds, plus the squeaks of stop and go braking. I take off the tire and notice that the 2 screws that hold the rotor are unscrewable. The heads on the screws are messed up. I was thinking maybe to drill of the head so i can install new ones when i put the new rotor. What are those screws called? Wonder if I can pick some up at Autozone.