Drilled and Slotted Rotors are some of the the best Brake Rotors in the industry. SP Drilled and Slotted Rotors stand above the rest, with no sharp edges on the brake rotor surface, there is little to no risk of cracking or heat checking. Drilled and Slotted Rotors provide the best cooling to the braking surface, extending the life of both the brake rotors and the brake pads.