Desmond Brand DAL-FW QR L Plate. Change quickly from landscape to portrait mode without adjusting your setup. Flywheel screw design makes attaching to camera a breeze. Ideal for cold weather / arthritic fingers etc. Metal flywheel screw is 42.8mm in diameter and includes a 4mm hex socket. All Metal Construction. 4 x hex safety screws. Screw range from vertical post 42mm to 64mm. Measures: 3.9" (100mm) horizontal axis x 2.5" (64mm) vertical axis. Width: 1.5" (38mm). Weight: 4.1oz (117g). Includes 2 allen wrenches. Ideal for RRS Lever Clamps.