A dedicated peening tool to ensure the safe and secure connection of Campagnolo 11 speed chainsAfter 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 preened or deformed to prevent chain failureThe precision-machined CT-11 is used to accurately perform this critical processThe 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 rivetThe Park Tool CT-4.2 Master Chain Tool is used for rivet installation