Try this, take your vehicle ignition key, hold the metal cut part in your index finger and thumb to resemble it in the ignition switch,and let the accessories dangle and think about the tiny tumblers in your vehicles ignition switch. Too much weight can prematurely wear the cylinders. There are not any test procedures during the switch designing phase that I am aware of for maximum load. Also be aware of any magnetized metals close to the transponder in the ignition column and in the key itself. A strong emf could erase or reset the code, and not allow the vehicle to start. Looking at your ring, I would say you are probably maxed out. I guess you are close to a 1/2 lb.?