ADJUSTABLE LENGTH - This adjustable hanging rope system is better than others like chain or polyester webbing. You can adjust the size you want (from 0.85-1.8m/2.5-5.9ft) to fit your swings or hammocks, but the chain can only be adjusted with a limited length range (always for 3.5 inches). STRONG & SAFE - These swing ropes have the same quality and strength as seat belts. Each can hold up to 660lb. While the 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 set, outdoor hammock, aerial flying yoga, hanging rope chair, garden swing, swing stand, disc swing, classic tree swing, toddler swing and porch swing, indoor swing, etc. GOOD QUALITY - Our swing ropes are made of commercial grade polyethylene and can withstand harsh winters and brutal summers without abrasion. 3-braided design provides better sturdy and reliable fixation.