RAM Mounts RAM Handlebar Rail Mount with Zinc Coated U-Bolt Base, Self-Leveling Cup Holder & Cozy RAM-B-132RThe RAM B 132R consists of a zinc coated u bolt base, double socket arm and self leveling drink cup holder with cozy. Designed into the mount is a 1in. diameter patented rubber ball and socket system with adjustment points at both ends of the double socket arm. With a twist of the arm knob, you can move the mount to your optimum viewing position. Included in this package is hardware that will accommodate rails from 0. 50in. to 1. 25in. in diameter.