The 15mm Rail Block clamp is for rod support rail system, follow focus support. Fits standard 15mm rods, strong, simple, great price, anodized black finish.
This 15mm Rail Clamp with 5pcs 1/4" female thread is widely used on standard DSLR/DV Support Rig to attach other bracket or device for convenient shoot and recording.
The adjustable thumbscrew gives you excellent leverage. When it runs into anything you can pull up the spring-loaded handle and reposition the handle to clear obstacles.
The LED light set, LCD monitor, friction arm can be attached on Shoulder Mount with this rod clamp holder.