Slab is right on with the fast water theary,I spent a day using them for laterun silvers. Did not hook a single fish out of 5 float/egg take downs. Missed 4 fish in the slower tailouts ,don't know if they even knew I was on the other end. Did manage to hook 1 out of 2 in the fast water at the head of a hole. Threw the entire package of gami circles away after I got home.