size: 15 mm / approx 5/8 in Hook: J:son SS.DF #18
Whenever you get a large spinner fall and plenty of spents on the water, the fish will in most cases get selective. Youre either in the to the game and have imitations in youre box, or youre out of it and can go home.
We do recommend you to use a J:son Swivel for all your fly fishing and all youre flies. However, it is necessary to use a J:son Swivel when youre fishing a J:son fly in size 1 or 2.