Cooler brakes stop your Hummer faster. Our Cross-Drilled Rotors offer the best stopping and best heat transfer available. Each rotor has a vein system developed on the inside of the rotor that actually sucks the hot air through the cross drill holes and through the inside of the rotor. Each cross drill hole is placed between the veins of the rotor so that strength is not compromised and heat transfer is maximized. All rotors are CAD plated. For best performance use with our Performance Brake Pads.