These are the same indicators you have seen Phil and others use on television shows such as The New Fly Fisher. The black peg pinches a loop of leader/tippet against the indicator, holding it in place; and once a strike is recognized the loop is released, allowing the indicator to slide free. I
It does not interfere with landing the fish in any way. Simply superior for fly-fishing still waters, rivers and streams.
Combo Pack - assorted colours.