Patened Self-Cleaning Holes: Unique conical holes help keep the pad and disc clean fron depris, as well as providing weight reduction and heat dissapation. Highest Quality Materials: High quality stainless steel, fully heat-treated and machined to the closest of tolerances. Stepped Outer Profile: Specially machined design enhances heat dissipation and helps resist warping at high temperatures. Coated Surfaces: Electrostatically enamel paint coated non-braking surfaces. Full Pad Compatibilty: Engineered and race tested to work perfectly with all types of brake pads - metal sintered, semi-sintered, and organic - for a controlled, consistent braking performance in all wet, muddy, and dry conditions.