Offers unique new applications. At 20" (500mm), it is the only Jumbo Plate for direct use on quick release plates. Free sliding adjustment over entire length if used with quick release plates. Includes additional 1/4" and 3/8" threads for direct mounting on tripods. Two reversible, 1/4" and 3/8", round camera plates to tighten camera and lens or view camera with two tripod sockets.