Oldsmobile Car keys come in a range of shapes, sizes, and types. Back in the day car keys were just a mechanical key, similar to that of your front door. Now though you probably have a Remote Flip or Transponder key. Remote flip keys are all encased in the one unit generally with buttons to lock and unlock your vehicle.
Transponder keys may or may not have buttons on them but your mechanical key will be encased with some plastic. The newest keys out there are the Smart Key. Just by having the key in your pocket is enough for you to be able to touch your car and unlock it. All of these car keys have transponder chips built into them. This chip is programmed to your cars locks and immobiliser.