The last time I ran my car the lock cylinder was stuck when I tried shutting it off. I had to use alot of force to get it to spin to the off position. When I did I heard a snap. I took the steering wheel off and removed the old cyclinder and found a small peice of metal snapped off into the end of the cyclinder. Im trying to figure out what that peice is called so i can replace it.. Its a small nipple that slides into the end of the cyclinder.