The Manfrotto 577 sliding plate adapter is ideal for adding to a camera stabilizer or camera rig to allow you to change supports without changing camera plates and it is compatible with most of Manfrotto’s video heads. The 577 adaptor has a safety lock feature for extra security and a quick release system for fast and easy set up. It also comes with both 1/4″ and 3/8″ camera screws and video camera alignment pin.