First the tech installed standard pads. Next, he tried ceramic and the third set is called Anti-Squeal. Don't have parts numbers. Don't know exactly what is in the hardware kit, but assume it consists of springs, clips, etc. ?? The rotors had been turned twice in the past for other reasons, but he assured me that they are OK and do not need replacing. Is there anything else that could be causing this other than the rotors? Thanks. BJ