"The Sirui G-20X Ball Head is an extremely sturdy head with separate control knobs for pan, tilt and tension, plus an Arca-style clamp for the included quick-release plate. The ball locks down extremely tightly thanks to the double-bevel locking system which allows support of cameras up to 44 lb and safe 90deg. tilting for portrait orientation. The quick-release clamp features a secondary release button that prevents any inadvertent disengagement of the camera/plate from the clamp, thereby adding to the head's overall security and stability. Three separate controls (pan, tilt and lock) allow a photographer to exercise extremely fine control over the orientation of the camera, whether it's a DSLR, 35mm, medium-format camera, or even a camcorder. Pan, for instance, can be adjusted while the tilt stays locked, enabling precise movement that's measurable via degree markers for panoramic photography at the panning base.The G-20X uses Computer Aided Manufacturing and an aircraft-grade aluminum alloy with a custom anodized surface treatment to ensure a durable, high-quality finish.|Sirui uses Computer Aided Manufacturing (CAM) to produce a support ball with tolerances within 0.01 mm of a perfect sphere. This uncompromising precision ensures superior performance and smooth operation for any type of 35 mm DLSR or medium format ca|Sirui ball heads are made of aviation quality aluminum alloy 7075-T6 and 6067-T6 for long life and maximum strength. Quick release plates are made from forged aluminum alloy. The forging technique produces high-density metals with much greater streng|The panning base is designed with a 360deg. dial. Having a separate panning base lock knob provides greater accuracy for panning and panoramic shooting|The patented safety lock design and Sirui quick release plates, effectively prevent the camera from accidentally sliding off of the ball head. Most Arca-style quick release plates can be used on Sirui ball heads|The custom anodized surface treatment makes all metal surfaces highly resistant to abrasions and produces a beautiful appearance|Superior locking force allows support of loads up to 44 lb|Dual bubble levels allow precise horizontal leveling for critical shooting situations"