The SHW Performance Drilled Monobloc Rotors PRX39961 are high-performance brake rotors designed for use in high-performance vehicles. These rotors feature a drilled design, which helps to dissipate heat and prevent brake fade during intense driving situations. The monobloc construction of these rotors ensures maximum strength and durability, while also reducing weight for improved performance. These rotors are compatible with a wide range of vehicles and are a popular choice among performance enthusiasts.