These are a flourscent chartreuse or Pink high visibility braided nylon line. They come mounted on a plastic tube shape holder. Slide your line through the nail knot tube holder slide the nail knot off the tube onto your line, the ends long enough to tighten the your line and remove the plastic tube holder. Then snug up the knot, by pulling both ends of the braided nylon line, slide into position, and tighten down. Don't cut the nylon line ends to short, you'll need them to tighten or move your nail knot while fishing. Each package comes with 10 beads & stops.