The Disc Brake Caliper Pin-Guide Pin ProLine 14167 by Carlson is a performance part designed for vehicles. It includes a set of two zinc-finished piston pins with a diameter of 3/8 of an inch for the bolt and 1/2 of an inch for the pin. These pins are essential components for maintaining proper brake function and performance. With a focus on quality and durability, this product from Carlson is a reliable choice for car and truck owners looking to replace or upgrade their caliper pins.