ADJUSTABLE LENGTH - This adjustable rope suspension system is better than others like chain or polyester webbing. You can adjust the size you want to fit your swings or hammocks, but the chain can only be adjusted within a limited length range (still for 3.5 inches). STRONG & SAFE - These swing ropes have the same quality and strength as seat belts. Each rope can hold up to 660 pounds. At the same time, industrial steel makes the buckles almost indestructible. Safe and fun for the whole family. UNIVERSALLY COMPATIBLE - These swing ropes work with almost any pole or tree, whether indoors or outdoors, such as swing, outdoor hammock, aerial flying yoga, hanging rope chair, garden swing, swing board, disc swing, classic tree swing, toddler swing, and porch swing, indoor garden swing, etc. GREAT QUALITY - Made from commercial polyethylene, our swing ropes withstand harsh winters and brutal summers without abrasion. 3-strand design provides better robust and reliable fixation.