The Sirui G-10X 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 39.6 lb and safe 90° 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-10X uses Computer Aided Manufacturing and an aircraft-grade aluminum alloy with a custom anodized surface treatment to ensure a durable, high-quality finish. 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 strength than die-cast methods. Optional model specific plates are available The panning base is designed with a 360° 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 Dual bubble levels allow precise horizontal leveling for critical shooting situations