Universal Quick Release System The Benro Universal Quick-Release System is designed to the same specifications as the Arca-Swiss system, and is also compatible with other similarly designed quick-release systems 360-degree Panning Accurate panoramas can be easily orchestrated using the graduated panning scale for accurate image alignment Locking and Drag Control Separate lock and drag adjustment knobs help to avoid confusion when working fast Built-in Bubble Level Allows adjustment to prevent uneven pans and head movement.