Fotga DP3000 M4 15mm Rod Rail Rig Quick Release Baseplate for DSLR Follow Focus Height Adjustable of this baseplate Come with two 30cm length rods This Rail System has a central Tripod Mounting plate that makes a perfect balance between the camera and the front mount accessories (35mm dapter/Mattebox/Follow Focus) Strong enough to support the large variety of smaller cameras and bigger cameras as well Quick-release version. With rotating knob screw lock design, which makes it is very easy and quick on attaching a camera. With 1/4" screw on the quick