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Brake rotors, also known as brake discs, are metal discs that are attached to the wheel hubs of a vehicle. When the brake pedal is pressed, the brake pads clamp down on the rotors to create friction and slow down or stop the vehicle. The rotors play a crucial role in the braking system, as they are responsible for dissipating heat and providing a smooth surface for the brake pads to grip onto. Over time, brake rotors can wear down and become warped, leading to decreased braking performance and potential safety hazards. Regular inspection and maintenance of brake rotors are essential for ensuring the safety and efficiency of a vehicle's braking system.