"The AirHed 3 is the ultimate ballhead for Professional users. Cast from aircraft grade ADC12 Alloy and engineered to withstand top-down loads of 200kg, the AH3 punches well above it's 340g weight. With integrated detachable Pano-Clamp, for level panning on uneven terrain and a hybrid Peak Design / Arca Swiss compatible release plate, the AH3 is the most functional ball head in the world today. Controls Ball lock and drag control knob Base pan control knob Clamp pan control knob Clamp release knob The new AirHed 3 is a culmination of ideas and functionality giving an unprecedented level of control. The detachable Pano-clamp can be utilized as a panning device independently of the AirHed 3 and has a standard 3/8"""" thread for attachment to tripods and monopods. It is also backwards-compatible with previous AirHeds, including the AH0, AH1 and AH2 from their previous Evolution 2 range. Direct Load With the head level and the clamp level, a direct downward load can be applied up to the capacity. Drag Drag is the load it requires to make the ball move within the head. This is tested by angling the ball and adding pressure until the ball moves. Donf t do this when attached to a tripod - your head is a lot more powerful than any tripod can withstand. Portrait When the clamp is locked sideways in the portrait position, this is the load that the clamp can hold without rotati"