The 12" bottom dovetail, with a weight-reducing cutout design, can be used with an ARRI-standard bridge plate for balancing your camera rig. Constructed of anodized aluminum, this dovetail has built-in 3/8"-16 and 1/4"-20 threads for mounting on a tripod quick release plate or other support. The plate also offers a release pin, and a stopper screw for additional security.