Tree Strap Kit includes a set of two, 10 x 2 nylon straps with attached O-rings and two S-hooks (rings and hooks are made of weather coated steel). Simply wrap the tree strap tightly around the tree until it grips, using the S-hook to connect the strap to the hammock. Do this on both ends. Tree straps are an economical and fun alternative to hammock stands and do not cause damage to trees. For use with single or double person hammocks. Weight capacity is 400 pounds.