Never Waver – 4 Independent lock knobs (Easy Grip Main ball lock, panning lock knob, camera QS lock knob, friction control lock knob) Precision Alignment- Dual bubble levels allow for easy quick fine-tuning and seamless positioning High Workload Performance – 66 pound safety payload for multi-gear options Safe - "Arca-Swiss" quick release system compatible and a built-in safety pin (includes QS-60 V2 quick release plate)