Funny, I haven't had a problem at all with my cam jaw replacement for my Renzetti Traveler. Gotta be 10 years old, too. Maybe I was just lucky? Or the production line that passed your two cam jaws through wasn't doing their job. Sorry to hear but I think if Renzetti were informed about two sets of jaws breaking, they would have appreciated your getting back to them because then they could go after whoever was responsible for making them in that batch.