SUNWAYFOTO PCL-6DR L Plate for Canon EOS 6D Camera Arca Compatible Sunway PCL-6D L plate for Canon 6D Camera Image plane mark on both horizontal and vertical rails. Precision CNC machined from solid aircraft-grade aluminum. Fully compatible with RRS Lever Clamps Includes 4 safety stop screws, 1 x 1/4" screw and 2 allen wrenches.