*RUNWELL* COG1218LS lockring wrench

RUNWELL, a Japanese handmade tool brand from Tsubame-Sanjo the Japan's manufacturing hub of metalware.

This thing takes care of it all.
The dedicated tool “COG1218LS” handles cogs from 12 to 18 teeth and also removes lockrings.

Unlike conventional cog removers, it requires no chain attachment. Simply use the left or right wrench section depending on the number of gears.
It bites in quickly for smooth removal and installation.

Certified as one of the tools provided to athletes at the Keirin Athlete Training Center starting in the 2025 fiscal year.
Its compact design makes it ideal for travel.