The Leofoto HB-70LR 70mm Professional Heavy-Duty Ball Head w/LR-70 70mm Lever-Release Clamp HB-70LR is a precision-machined ball head made from high-grade aluminum, designed to support heavy gear with a maximum load capacity of 88 lbs. It features a 70mm ball diameter, a 81mm panning base diameter, and a height of 138mm. The ball head includes three separate knobs for locking the ball, tension control, and panning base lock. The LR-70 lever-release clamp allows for quick attachment and detachment, making it ideal for professional photographers and videographers who require stability and ease of use.