Detail RAM® Handlebar Rail Mount with U-Bolt Base, Level Cup™ Drink Holder and Koozie High-strength composite and powder-coated, marine-grade aluminum mount with drink holder designed with two pivot points to keep your drink upright, regardless of conditions Kit includes a zinc coated U-bolt base, double socket arm and RAM Level™ Cup Self-Leveling Drink Holder with Koozie base includes black cover caps to be placed over exposed ends of U-bolt Integrated eyelet and hook provide an optional tethering function to help secure any small or open container U-bolt accommodates rails from 0.5 to 1.25 in diameter Fits cans, cups, mugs, etc. ranging from 2.5 to 3.5 diameter 1 rubber B ball size