RAM® Double Socket Arm with Retention Knob - B Size Medium RAM-B-149Z-A-GA14 Tighten the knob on the

Tighten the knob on the metal strap with a screwdriver until it has a firm hold on the rail

To mount the RAM-B-108BU-HUM1 base

The RAM-B-236U will attach to all 1" diameter ball compatible arms

matching the industry-standard AMPS hole pattern

5" diameter ball and two zinc-coated u-bolts

RAM® Double Socket Arm with Retention Knob - B Size Medium RAM-B-149Z-A-GA14 Tighten the knob on theThe RAM B 201 ALA1 KRU, STANDARD length double socket arm with retention knob, has a socket at both ends that accommodates 1" ball bases. A single spring inside the arm opens the end sockets, allowing you to pivot the ball and socket connection. The knob extension allows for easy adjustment of the mount and prevents over loosening of the knob. This socket technology allows for almost infinite adjustment and perfect viewing angles.