Heavy wire, 2X-long hooks are today the most popular models used for tying flies imitating nymphs (The larvae of mayflies, caddis flies, and stoneflies).
They also are popular for grasshopper patterns.
Package of 25.
Round bend
Down-eye
1X-heavy wire
2X-long shank
Uses: Wet Flies, Standard Nymph Patterns, Muddlers, Hoppers