RAM Mount Handlebar Rail Mount w/Zinc Coated U-Bolt Base and Universal X-Grip Cell/iPhone Cradle [RAM-B-149Z-UN7U]Handlebar Rail Mount w Zinc Coated U Bolt Base and Universal X Grip Cell iPhone Cradle The RAM B 149Z UN7U consists of a zinc coated u bolt base, double socket arm and universal X Grip cradle. Included in this package is hardware that will accommodate rails from 0. 50" to 1. 25" in diameter. The base includes black cover caps to be placed over the exposed ends of the u bolt. The mount is designed with a RAM 1" diameter patented rubber ball and socket