HH Sintered Metal Disc Brake Pad Characteristics: HH Grade high static friction coefficient up to 0.55 . Superior stopping power compared to carbon organic, Kevlar organic, or semi-metallic organic pads. High temperature resistance up to 800â??ï¼?(max. 1000�°C) . The lowest wear rate determines Low abrasive interaction with the brake rotor. Performing exceptionally well in wet or muddy condition .from commuting, to stunt or street-race riding, to extended high-speed highway or road-race driving. Compatible with cast iron, steel or advanced stainless-steel rotors. "The sintered friction material is soldered to the copper coated backing plate by the means of powder metalurgy. so separation is virtually eliminated "