Allow you attach rod to your rod support / rail system at different angle. It is adjustable. It is stronger now, The bottom part was threaded a through hole now.
The rosette lock is compatible with ARRI / Lanparte rosette lock, made of stainless steel. A spring along with the M6 screw, to prevent the rosette scratches from each other when release the screw knob.
Fits 15mm rod support. A replacement of 90 degree rod clamp / rail block.