Can anyone tell me what this part is?
 

So I recently bought a cab over camper and in it came with 4 of these. I have no clue what they are for....any ideas what they are called?

<a href="http://imgur.com/bROJlJy"><img src="https://i.imgur.com/bROJlJyl.jpg" title="Hosted by imgur.com"/></a><br><a href="http://imgur.com/96Lh0Bc"><img src="https://i.imgur.com/96Lh0Bcl.jpg" title="Hosted by imgur.com"/></a>

Camper hold downs.

C.R. Brophy Machine Works, Inc. -- Tie Downs / Hold Downs

BTW, welcome to FTE. Hope you haven't been tooling around without something to hold the camper in besides gravity.....