RAM MOUNT Drink Holder BaseConsists of hardware for mounting to either brake clutch reservoirs and rails that are 0. 5" to 1. 25" in diameter, short length double socket arm and Level Cup self leveling cup holder. Designed into the mount is a 1" diameter patented rubber ball and socket system with adjustment points at both ends of the socket arm. The mounting hardware for brake clutch reservoirs include both standard and metric mounting bolts. Take a corner as hard as you like,