Metro Friction D785.20 Graphite Metallic Police Formula Disc Brake Pad Set (4 Pads) Police formula passed FMVSS 135 OEM the Highest Test for Performance and Safety. Graphite is a dry lubricant able to reduce friction between two surfaces sliding against each. Ceramic fibers provide stable and predictable friction characteristics. Combination allows for low rotor wear and less noise than semi-metallic formulas. RECOMMENDED LUBRICANT: Permatex #09973, Ceramic Extreme Brake Parts Lubricant, 4g Pouch. RECOMMENDED HARDWARE: Carlson P785, Brake Pad Installation Kit is rubber coated for maximum performance.