The SRS-7 Slide Rail System is new in the Kirk line up. The SRS-7 is a toned down version of our FR-2 Geared focusing rail. The geared lead screw has been replaced by a simple glide version that smoothly moves the camera or collared lens fore-and-aft or left and right on the rail. Once in position it can be firmly locked down with a simple twist of a knob. This Slide Rail is perfect for macro nature, panorama and commercial photography that does not require the geared precision of the FR-2 focusing rail. The SRS-7 is a great addition to the FR-2 to achieve a left and right slide for extreme flexibility.