Raybestos ATD921C Advanced Technology Ceramic Disc Brake Pad Set Advanced friction formulations minimize noise and dust while maximizing overall braking performance Application specific shim materials minimize noise, vibration and harshness Slots and chamfers optimize quiet operation and effectiveness Nitrile-polymer coated abutment clips maximize noise suppression Integral electronic wear sensors included where applicable Application specific shims for lowest noise and longest life Quiet coated hardware for maximum noise suppression Advanced formulations to deliver increased stopping Power Electronic wear sensors Vehicle specific slots, chamfers ensure quiet operation