The Induro BHM1 Ballhead features double action separate positioning and pan controls, a Universal Arca-Swiss style Quick Release mounting plate system, and an Integrated Lock Limiter Tension Disk to fine-tune the ball's movement, and properly balance the tension with the weight of your gear. It has a large locking knob to control the movement of the ball, and a separate lock to control the 360 degree panning motion. Featuring a slim profile, the BHM2 supports heavy payloads up to 44.1 lb, 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. Specifications: Load Capacity: 44.1 lb (20 kg) Tripod Thread Mount Size: 3/8" -16 Weight: .9 lb (.4 kg) Ball Diameter: 1.42" (36 mm) Base Diameter: 1.97" (50 mm)