Professional whoopie slings from ArborMAX. Despite it's funny name, these slings are serious hardware. This old fashioned choker sling is mainly used to mount hardware (like the port-a-wrap) to the base of a tree. Made from 12-strand polyester Samson Tenex TEC rope and designed for knotless rigging. One eye is fixed and the other is adjustable, with one end of the spliced rope passing through the center of the hollow core. It can be quickly adjusted to the diameter of the trunk by pulling the tag end, so you can get it nice and snug.