Why are there small fighting/cork butt ends on euro-type nymph rods?

By A Mystery Man Writer

Competition MKII Series Fly Rod - Euro Style Nymphing – Cortland Line Company

Just completed building this euro rod - 10' 3 wt. : r/flyfishing

Review: Redington STRIKE fly rod Hatch Magazine - Fly Fishing, etc.

The Best Euro-Nymphing Rod for You

Euro Czech Nymphing Downlocking Vented Seat w/Carbon Insert w/EVA Fighting Butt - Custom Fly Rod Crafters

Specialized Fly Rods for 2022 - Fly Fisherman

Diamondback Ideal Nymph Euronymphing Single Handed Fly Rod, Single-handed, Fly Rods

Nymph Series Fly Rods - European Style Nymphing – Cortland Line Company

You can find my review of these rods at this link. , Thanks to Austin Curtin for several of the product photos., A new favorite here at Tactical Fly

Adams XTZ Euro Nymph Rod

Guideline Fly Rods LPX Nymph - Fly Rods - PROTACKLESHOP

Buy Maximumcatch Maxcatch 10'0''/10'6'' 2/3WT Competition InTouch Nymph Fly Rod for Euro Nymphing Fly Fishing Rod with Hard Tube at Aliexpress for .

Maximumcatch Maxcatch 10'0''/10'6'' 2/3WT Competition InTouch Nymph Fly Rod for Euro Nymphing Fly Fishing Rod with Hard Tube

Guideline Fly Rods LPX Nymph - Fly Rods - FISHING-MART

Orvis Helios 3F Rod Review: A Euro-Nymphing Rod That Can Do It All