"These are like the whoopie hooks that have been used for years with one twist. They have an extra hole to receive a spreader bar.  This way you can turn two single hammocks into a double hammock, yet they are totally functional when used apart.  This saves you the trouble of switching out your suspension between trips."

 

The above wording is straight from Dutch, and his team. 

Double Hammock Whoopie Hooks (pair)

£22.72Price