you can get a "meh" forget key term. one end of the chain has a large O instead of a hook. all you do is drop chain around post, and as you pull up on the chain it tights automatically through the O on the one end. then i tend to have to wrap chain 2 to 3 times. so chain does not slide off of post. there are a couple other chain like devices but have better "grasps" with some small teeth on them that sink into metal posts. so there is no slipping.