Centric Power Slot Performance Brake Rotor features the latest state-of-the-art manufacturing process that permanently improves the performance and its service life. It is machined into the rotor. Centric Power Slot Performance Brake Rotor helps evacuate gases and dust, shed heat, and keeps the brake pad surface clean. And in wet, raining conditions, it helps push water off the braking surface for better stopping power. Centric Power Slot Performance Brake Rotor offers an extra level of protection against thermal distortion and wear. For most late model truck and SUV applications and select sports cars, we also use a special Power Alloy metallurgy and directional cooling vanes to improve high temperature performance. Ensures maximum safety over time!