RAM® Double Socket Arm with Extended Retention Knob - B Size Long RAM-B-174-UN4U The rectangular base contains four

The rectangular base contains four holes with a center to center pattern of 1" x 2

The yoke clamp base will fit rails from 0

25 x 2 inch rectangular base

The RAM ROD® male ratchet adapter enables the direct attachment of a 1

RAM® Double Socket Arm with Extended Retention Knob - B Size Long RAM-B-174-UN4U The rectangular base contains fourThe RAM B 201 C ALA1 KRU, long 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. This socket technology allows for almost infinite adjustment and perfect viewing angles.