Wilwoods MC4 Mechanical Parking Brake Caliper is a multi - use, cable operated brake caliper that combines high output performance with simplicity in design and construction, and is the perfect solution for vehicle applications requiring a separate, mechanically actuated parking brake caliper. Built to accept rotors that are .810 thick, with 11.00 - 12.88 diameter range, the MC4 combines an efficient die cast body with a forged billet anvil for superior strength under load, yet is lightweight at only 3.30 (2.95 without pads) pounds. Supplied with each caliper are our Composite Metallic (CM) high - friction, high static - hold brake pads, and are pre - fitted with noise cancelling shields.