The ALTA BH-250 ball head is a multi-action ball head with precision control. Weighing in at just over 577g/20ozs and a carrying capacity of 20kg/44lbs you can bet your gear on top will remain rock steady. This ball head has a separate locking knob, friction knob and panning knob allowing the unit to adjust to your working style. Never Waver – 4 Independent lock knobs (Easy Grip Main ball lock, panning lock knob, camera QS lock knob, friction control lock knob) Rapid Intuitive Positioning- Set up your shot in seconds Robust Build Construction- Made from lightweight aircraft aluminum which provides long-lasting performance Precision Alignment- Dual bubble levels allow for easy quick fine-tuning and seamless positioning Quick Shoe Safe- Uses an “Arca-Swiss” quick release system with built-in retractable safety pin positioned on the top of the mounting plate of the head. Double security for your valuable equipment Quick Shoe- QS-60V2 38mm universal Arca compatible plate. Compatible with all Vanguard BH series Ball heads and many other heads.