RAM® Drill-Down Double Ball Mount with Rectangle AMPS Plate - Long RAM-109U-G2 The rust proof metal u-bolt

The rust proof metal u-bolt accommodates rails in 1" to 1

5" Plate will connect to a large variety of third party cradles and mounts

This Crown double ball mount comes with a short C Size arm

A single spring inside the arm opens the end sockets

RAM® Drill-Down Double Ball Mount with Rectangle AMPS Plate - Long RAM-109U-G2 The rust proof metal u-boltThe RAM B 139U A consists of a medium length B size double socket arm, one 2. 5" round plate and one 2" X 1. 7" plate that contains the universal AMPS hole pattern. The mount is designed with a 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. The AMPS hole pattern on each plate will connect to many RAM cradles,