Duralast has been engineering brake hardware to meet the highest of expectations by ensuring every piece of every kit, fits and functions exactly the way it should in every applications braking system.Brakes are designed as a system and all the parts need to work together for best performance. Industry brake service experts agree - when brake friction materials are ready to be replaced, the hardware is too. Caliper Guide Pins are important to replace because they hold the brake piston in place to create effective stopping performance.