For anyone who regularly cleans and tightens the side terminal studs on various GM vehicles, this tool will come in handy! I could never remember if the small hex bolt heads were metric or standard. Which key to use? Which socket is right for you? Should I just use pliers? noooo! I don't have to trust my memory with this little special key, I just take it and go. The ratchet can be switched with a small lever. But maybe it's just a little "too complicated": Just flip it over to switch fromβ¦