These caliper rock guards are manufactured from .075" thick, 316 stainless steel mount directly to the Baer 6T caliper and are designed to protect the caliper and bleeder screw from rocks and other debris. Each Rock Guard kit includes 2 caliper end guards, 2 bleeder screw guards and mounting hardware and are sold per caliper. New brake kits would require 2 Rock Guard kits, 1 per caliper.