I tried this in mechanics w/o any results so I'll try here. I had the brake pads changed on my new bike to cork brakes for the carbonn wheels, but I don't know if the holders were changed out as well. At any rate I want to put on swiss stop pads and the screw on the holder that screws through the holder onto the recess on the pad will not come out. I think it is suppose to be an allen wrench, but this appears to be just circular. Do they make the holders and pads disposable or is the a secret o getting the little screw out?