The Indoor BHM-Series Ballheads feature double action separate positioning and pan controls, a Universal Arca-Swiss style Quick Release mounting plate system, and a new Integrated Lock Limiter Tension Disk - all with positive locking knobs. Featuring a slim profile, the BHM-Series supports heavy payloads up to 66.1 lb making them an ideal support for a wide variety of cameras and lenses. Each Ballhead is housed in a precision-machined black magnesium alloy body and includes a matching Arca- Swiss style compatible QR Plate.