SMALLRIG 15mm Single Rod Clamp with Double 1/4" -20 Female Thread for DSLR Support Rig System - 842 New Single Rod Clamp for 15mm rod on DSLR Rig, the rod clamp comes with Double 1/4" thread. You can install an Articulating Arm on the female 1/4" thread, and install a monitor or a LED on the articulating arm. Includes ONLY 1pcs 15mm-Single-RodClamp-2 Metal: aluminium alloy Notes: the rod rig, arm and monitor in the above images not included.