Index clips fit over mil-spec 1913 rail, snapping on and snapping off to provide a more comfortable grip. We carry three different clips: standard clips, keeper clips and hook clips. The standard contains no exterior protrusions, the keeper features a downward bar to push a cord down and the hook features an upward-curving hook to secure cords in place. The price listed is for one clip of the selected style. We sell these individually so you can assemble your kit exactly how you want it.