FOTGA DP500 II C-shape Cage Bracket Support for 15mm Rod Rail DSLR Rig Follow Focus This cage bracket is another part of the Fotga DP500 II series.It is designed according to ergonomics It is specially designed for follow focus,15mm diameter rod rail,mattebox,etc. With standard hot shoe mount on the upside.You can mount your microphone,off-camera flash or any other accessories with standard hot shoe The DP500 II C-shape cage bracket support is improved based on the first generation.The button bending part is locked by 2pcs screws,very sturdy and safe The advantage of such design is you can adjust the angle of the bending part largel enough to detach your camera very easily and quickly from a complicated well-built follow focus,rail support rig series ,but no need to take long time to disassemble all of them one by one hardly, and then release the camera