In the mid 1980s, Daiichi introduced this "swimming nymph" hook to form the foundation for swimming mayfly nymph artificials, and for flies imitating leeches or worms. The gentle "s" curve helps give a life like appearance to these creations.Uses: Swimming Nymphs, Leeches, San Juan WormsSproat bendstraight-eye1X-fine wire3X-long curved shankforged