Manfrotto MSQ6 Top Lock Quick Release Adapter with PlateManfrotto MSQ6 Top Lock Quick Release Adapter with Plate This adaptor allows you to fit the Manfrotto Q6 Top Lock quick release system to an existing photo head. The Top Lock system has been developed to offer photographers a fast, easy to use and very secure camera quick release mechanism suitable for heavy pro equipment. The camera plate clicks into the clamp from above, and as soon as it engages, it triggers a safety pin that stops the plate and