Simplify and speed up the connection between fly lines and leaders. Vision's specially made, braided coupling loops are attached to the tip of your fly fishing line that lacks a loop. Then you can easily attach the loop on the leader to the loop on the line. Loop to loop becomes a strong and flexible connection. There are 4 loops in a package. - Small - Fly lines up to #6 (6.8kg) - Medium - Fly lines in #6-#8 (11.3kg)