The Grand Trunk TreeSlings Hammock Hanger makes it easy to hang any hammock. This kit includes two 20 foot cords that are 5mm thick and includes two sling-style tree protectors that won't dig into a tree or post and will prevent any slipping or sliding. The slings are pre-knotted for easy hanging. Just attach them to carabiners or S-hooks at the end of your hammock and you are set.