MOST ADVANCED CAMERA SUPPORT SYSTEM: The CNC forged, anodized aluminum Everest H4 Ball Head Tripod Mount with innovative flip-lock clamping Arca Swiss world standard Quick Release Plate can handle 55.1 lbs load capacity 360° PANAROMIC ROTATION: H4 Camera Tripod Head employs state-of-the-art ergonomic design, flawlessly smooth movement and jitter-free panning, providing 180° tilt and base camera rotation plus the second knob to independently control the DUAL U-SHAPED CHANNELS house the neck of the tripod swivel head ballhead platform base that is attached to the ball. The two notches guarantee support and security DUAL BUBBLE LEVELER: 2 bubble levels, 1 on head perimeter, and a 180° circular bullseye, assure absolute alignment in any 3-dimensions - Horizontal axis, Vertical axis, and Zenith/Arc leveling