Lezyne chain drive tool 11 spd 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 lezyne chain drive 11 speed not only drives the connecting rivot it also peens the end of the connection rivet this makes this tool very economical in comparision to others tools for the same job weight 100g