1X-long hooks are about "one eye length" longer than standard shank length.
They are used for slightly longer wet flies, which give them a "truer to nature" dimension, considering that wet flies represent mayflies, which are long bodied insects.
They are also a reasonable length for mayfly nymph imitations or wet flies featuring a bead head.
Package of 25.
Sproat bendDown-eye1X-heavy wire,1X-long shankUses: Wet Flies, Traditional Nymphs