Why invest in a quick release system? Because screwing your camera or lens onto a platform with standard 1/4"-20 screw is tedious and insecretic. It is not only a hassle to screw your equipment onto this platform, but after installation, the camera or lens is free to rotate. There is nothing to prevent it from coming loose. Why invest your money in a tripod and tripod head only to interfere with your shots with an unsecure connection between camera and head? Instead, use the Really Right Stuff quick release system. The Really Right Stuff quick release system is based on the Arca-Swiss standard and has two parts: a quick release and a quick release plate. You always need both parts of the system. The clamp stays on your tripod head/accessories all the time and the plate stays on your camera all the time. You need to purchase a separate quick release plate for each camera or collar, telephoto lens, which you want to mount in the quick release clamp on your tripod head. Jaws open and close in one of two ways: by turning a knurled knob on our proven and genuine screw knob clamps; or by turning a single lever on our innovative, patented lever clamps. The graceful stainless steel S shaped cam locking lever offers desirable advantages over traditional screw knob clamps. Features: Easy to charge from the top. In a quick hand the clamp can be opened from closed to fully allowing easy top charging from Arca-Swiss compatible.