StopTech Power Slot Plus rotors are manufactured to the highest tolerances of safety and quality. Slotting, unlike drilling, will not compromise the structural integrity of the rotor; drilling weakens a rotor and may cause stress points that can lead to cracking and failure. Drilled rotors also lose considerable surface area compared to slotted rotors, which means a smaller surface area for pad-to-rotor contact. StopTech Power Slot rotors are designed using the highest quality OEM replacement blanks. All machining is done in-house to StopTech Power Slot's application specific tolerances to ensure optimum quality control. The final touch is a military-spec cadmium plating that gives StopTech Power Slot rotors their bright silver finish and protects the rotor from debris. This eliminates 'rusty rotor syndrome' and enhances the look of custom wheels.