T-Lever controls two actions in one: locking & unlocking the ball and panning base.
T-Lever is springloaded; pull it out and re-positiion it in any one of 6 positions.
Custom mini-clamp with screw knob installs with one 1/4"-20 flat head screw (comes with one B2-mAS clamp installed).
Really Right Stuff-style camera body quick-release plate required; purchase separately. Body plates are model specific, not generic. Under the Categories tab on left, select "Camera & L-plates" then drill down to your specific make and model.
Most tripods have a mounting platform with a 3/8" threaded stud. However, some tripods have a smaller 1/4" threaded stud (if your camera can thread onto the stud on your tripod, then it is only 1/4"). In order to mount our ballhead, you will need to order an adapter called a bushing. For a more secure installation, we recommend installing the bushing with non-permanent threadlocker fluid.