Pedros Freewheel Socket, Multi-Speed 12-Spline x 23mm

A 24mm externally driven socket for matching 12-spline, nominal 23mm freewheel fittings, including the listed 5-10-speed types.

The working profile is 22.7mm. Fit depends on the exact freewheel or lockring interface; selected Campagnolo cassette and bottom-bracket applications also use this profile.