ACDelco Gold (Professional) Remanufactured Non-Coated Loaded with Ceramic Brake Pad Disc Brake Calipers are the high quality alternative to Original Equipment (OE) parts. Disc brake calipers act as a clamp to press the brake pads against the brake rotor when the brakes are applied. Remanufacturing brake master cylinders is an industry standard practice that involves disassembly of existing units, and replacing components that are most prone to wear with new components. Damaged and obsolete parts are replaced, and completed units are tested to ensure they perform to ACDelco specifications. In addition, remanufacturing returns components back into service rather than processing as scrap or simply disposing of them.