I wanted to pass this on as well to those that are not familiar with them. These are great for Multi fly aplication as they can't twist like tying a tag to the leader. http://gamakatsu.com/new_products/new_dropperbead.htm I use a small split shot below the dropper bead to keep it from sliding down but a knot will also work. Sink putty is cool cause you need very little. For 6 lb line the medium works great. 6lb is probably max for the small, but small will work as well.