For professional video applications, the Sirui BCH-30 Video Head is based off a 100mm ball mount for use on compatible tripod legs or other accessories such as sliders and jibs. Friction adjustment can be applied in 7 steps, with the 0 setting providing nearly-frictionless movement. A 13-step adjustable counterbalance can compensate for cameras weighing up to 39 pounds. The BCH-20 is controlled with dual rosette-mounted pan handles. Both pan handles easily extend for greater leverage when using heavier cameras. Extra camera-mount screws are kept in 1/4"-20 and 3/8"-16 tapped holes on the sides of the head. When vacated, these holes can also be used as accessory mounting points. The calibrated camera platform secures the camera plate with dual locks, preventing the camera from accidentally falling off the head during adjustment. To save time when balancing your camera, the platform is etched with calibrated measurements. Aluminum alloy is used in the construction for durability while maintaining a manageable weight.