3c75ebfd_e_Comparison___RacingBrake_com__Benefit
[Features] Finish [Competition] Drill or slot [RacingBrake] Slotted, Drilled&Slotted, or Open slot available (Learn more...) [Benefit] 
Open slots improve cooling, prevent cracking, and vent gas and debris without build up
Feature Comparison - RacingBrake.com
Benefit