Part#: RAM-280U UPC: 793442001055
The coupler is to combine 2 RAP-200-1U to form a double socket arm with the capability to rotate 360° in the center of the arm. This is intended for Heavy duty uses.
RAM® Single Socket Arm with Octagon Clamp
RAM-200-1OFU
$63.99
RAM® Round Base Adapter with Aluminum Octagon Button
RAM-324-OFU
$40.49