I hate it when my Cheerios roll off the table in the morning, so I stuck these two levels on. They are on the front starboard corner near the jack. You would think the trailer would have come with them. I started out using a nice circular bubble level on the tongue, but after wiping up a bowl of breakfast food off the floor one day I discovered that when the tongue said the trailer was level it wasn't. That's a little scary all by itself.