Oversized head lock knob - provides a good all-weather grip for smooth camera positioning and locking control * Unique integrated lock limiter tension control - rapid independent adjustment compensates for individual camera weight * Separate pan action lock and graduated base scale - makes 360-degree horizontal camera positioning simple and repeatable * Arca-Swiss style quick release system - accepts industry standard interchangeable QR plates and brackets * Double safety lock - dual-action control assures smooth, secure and rapid camera changes