The RAM® Torque™ handlebar and rail mounting base has a 1” rubber ball and accommodates bars 1 1/8” to 1 1/2” in diameter. Sizing inserts are included to provide a snug fit and protection of the rail. The mount utilizes nylon-insert lock nuts to prevent loosening in high vibration environments. Included is a short double socket arm and a Level Cup™. This gyroscopic sel-leveling cupholder is compatible with any cups, cans, bottles or mugs ranging from 2.5” to 3.5” diameter.