These little screws always rust and bind and cause troubles getting your rear rotors off so, chances are you'll be needing some new ones after you totally destroyed the ones that are on your car!  These are actually a little better than the originals because they incorporate a Phillips head which has more engagement than the standard flat head.  Get them here now with your caliper, rotor and pad order and "Save 1/2 Off Department Store Pricing!!" (Geeez... I need a life.  I've been watching too much TV).