The Sirui VP-350 Video Quick Release Plate is designed to support your telephoto lens-equipped camera. It can be used on any Manfrotto quick-release tripod. This quick-release plate has three mounting screws: the 1/4"-20 mount Arca-type quick release on the upright support for the camera, and the 3/8"-16 and 1/4"-20 mounting studs on the horizontal bed for the telephoto lens. Additionally, the Sirui quick-release plate has rubber mats on its surface for preventing the mounted equipment from slipping. Also, the plate includes a spring-loaded alignment pin for positioning the lens accurately. You may adjust the balance of the mounted camera with the help of the bubble level incorporated in the plate. For shooting in portrait mode, you may use an L bracket as well.