Surprisingly it has always been stable. I've been using this as my keychain for a long time and it's never even come close to breaking. The first time I made it I thought I had cut too much of the excess zip tie off, but it never gave me a problem at all. I always find a way to keep the keychain to no more than 3 or 4… » 7/16/13 2:34pm 7/16/13 2:34pm