BENRO B-Series ball heads offer manual drag control, dovetail quick release mounting plates, smooth - independent panning control, and positive locking knobs. BENRO B-Series ballheads offer manual drag control, smooth independent panning control, and positive locking knobs and quick release mounting plates. All housed in a precision-machined black anodized aluminum body. 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. Accurate 360-degree panoramas can be easily orchestrated using the graduated panning scale for accurate image alignment. The separate lock and drag adjustment knobs help to avoid confusion when working fast.