The Moving Rail Kit lets you expand your quilting reach. This innovative quilting frame add–on for long–arm quilting works like an idler rail that moves back and forth with the motion of your quilting machine. The moving rail adds up to 4–6 inches to your reach, and works to keep your block size consistent. When quilting normally, the layers gather on your take–up rail, taking up space and reducing reach. The moving rail moves this fabric build–up to keep your quilting reach the same throughout the quiting process.