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

This Freewheel Socket is for the 12-spline interface found on suitable multi-speed freewheels, which is different from a cassette-lockring fitting.

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.