That is correct and I've always kept my keychain pretty minimal because of that. My latest vehicle doesn't have an ignition cylinder, just a push button, so I can put all the weight I want on the chain with it, and that particular fob is already pretty heavy. So far I've added a small Fenix light to it since I'm always carrying at least one good sized knife with me.Keychains are for keys. You destroy your cars ignition locks cylinder by putting heavy stuff on your keychain.