Kupo headrest mounting bracket is built by aluminum extrusion bar in black anodized, there are total 16pcs x 3/8”-16 anti-twist threads and 5pcs x 1/4”-20 threads on a nato track and another 5pcs x 3/8”-16 threads on vertical which enable the various accessories such as monitor, recorder, wireless, focus unit and clamp to be mounted on a carʼs headrest. The bracket is 42cm length can fit most of headrest with 2 bars and 3/8”-16 female threads on each end which you may connect with another bracket through a double end 3/8”-16 male adapter (KS-128) when it is necessary. The supplied 2 clamps can lock the post size from 10~11mm or 12~13mm, slide it into the track of bracket to make an ideal rigging position.