Daiichi 1770 Swimming Nymph Hooks have a Sproat bend, straight-eye, 1X-fine wire, 3X-long curved shank, and are forged. In the mid 1980’s, 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.