Black Widow HD2 (BWG-HD2) Gimbal Head by Jobu Design Suitable for lenses and cameras weighing up to 12lbs. A stiff tripod recommended for up to 25lbs of load. 3/8"-16 mounting stud required. With shortened several key design elements to reduce flex and increased the stiffness of the horizontal mount arm. The overall experience is much tighter when utilizing larger lenses. A ball bearing system similar to Jobu BWG-Pro to offer unparalleled smoothness in the tilt axis. Even with a large load of camera and lens, there is virtually zero friction. It also uses new rubberized knobs, which are comfortable and easy on the hands.