RAM Torque 1 1/8" - 1 1/2" Diameter Handlebar/Rail Base with 1" BallThe 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 locknuts to prevent loosening in high vibration environments.