The SHW Performance Drilled-Dimpled MB Rotors PRL39913 are high-performance brake rotors designed for use in vehicles. These rotors are specifically designed with a combination of drilled and dimpled holes to improve heat dissipation and reduce brake fade. The drilled holes help to dissipate heat and prevent the build-up of gas, while the dimpled holes create turbulence to improve cooling. This results in improved braking performance and increased longevity of the rotors. The SHW Performance Drilled-Dimpled MB Rotors PRL39913 are a great choice for drivers looking for enhanced braking capabilities.