After pressing the special connecting rivet into a Campagnolo 11-Speed Chain and breaking off the pilot, Campagnolo requires the end of the connecting rivet to be "peened" or "deformed" to prevent chain failure. The Park Tool CT-11 Rivet Peening Campagnolo 11 Speed Bicycle Chain Tool is used to accurately perform this critical process.
*Note: The CT-11 will not install or remove chain rivets. Its sole function is to peen and secure the end of the Campagnolo 11-speed connecting rivet. The Park Tool CT-4.2 Master Chain Tool (or previous model CT-4) is used for rivet installation and removal.