3 Legged Things newest professional Air Hed is a beautifully crafted multi-functional ball-head precision engineered from aircraft-grade magnesium alloy & furnished with stainless steel fixings. Control. The Air Hed Light comes with our strongest locking system yet & smooth precision action. The ergonomic grip of the main control knob makes it easy to hand tighten the Air Hed & with a working load capability of 40kg it is one of the strongest ball-heads in the world. Design. Designed with a traditional base pan-&-lock mechanism which allows for smooth panning even under load. The Air Hed Light incorporates 3 Legged Things innovative modular design enabling users to detach the clamp for use on any 38 device. This is particularly useful if using the detachable monopod leg on any professional 3 Legged Thing tripod. Compatibility. The Air Hed Light comes with the QR3P Release Plate which is both Peak Design & Arca Swiss compatible. The Air Hed Lights clamp is compatible with all standard Arca Swiss release plates.