The SHW Performance Smooth Monobloc Rotors PRL39923 are high-quality brake rotors designed for optimal performance and durability. These rotors are made from a single piece of high-grade steel, ensuring a strong and stable structure. The smooth design of these rotors allows for efficient heat dissipation, reducing the risk of brake fade and improving overall braking performance. These rotors are compatible with a variety of vehicles and are a great choice for those seeking improved braking performance on the road or track.