ACDelco 17D931MHPV Specialty Semi-Metallic Performance Front Disc Brake Pad Set for Fleet/Police Rubberized adjustment clips for quiet operation Premium chamfers and slots match up with original equipment Nucap Retention System (NRS) backing plates used when possible for superior performance Utilize damped iron metallurgy to reduce noise, vibration, and heat Tested to SAE J2784 standards for braking effectiveness, along with Noise/Vibration/Harshness (NVH) and durability/wear testing for assurance of quality