Double Quick-Change pads are compatible with our Wilwood Forged Dynalite and Billet Dynalite calipers. Medium friction, low to medium temperarture range. Good cold torque response. Low to moderate wear rate Pads are sold as a set of 4. Iron/steel rotors, very high cold friction, strong fade/glaze resistance to periodic heat, excellent Dirt, dual purpose Street/Autocross Overall Height:2.38 Overall Width:3.96 Overall Thickness:.49