Manufactured to meet QS and ISO Quality System Standards; Utilizes an Electrocoating finish that provides long lasting corrosion protection; Designed to withstand 400 hours of salt water exposure without rusting; Double disc grinding ensures parallelism, eliminates run out, and provides near perfect disc thickness; The double disc grinding also leaves a non-directional finish on the friction surface area for more effective pad-disc break in while providing quieter and smoother stops; Center-split core casting offers proper heat transfer and thermal efficiency for superior braking and safety; 100 percent fully machined hat delivers better disc balance; Mill-corrected to a tolerance of less than 2 oz. per inch.