The Perfect 4ft Tree Swing Hanging Strap with Heavy-Duty Carabiner ENHANCED SAFETY FEATURES: Due to the high strength nylon we use in our tree swing kits, each strap holds up to 2000 pounds. And to prevent the straps from coming off while swinging, we us Heavy Duty carabiners. FITS ALL SWING TYPES: A single strap is perfect for spinner swings, tire swings, disc swings, web swings, and hammock swings. Purchase two straps for classic tree swings, garden swings, toddler swings, and porch/patio swings. ULTIMATE TREE PROTECTION: At TerraScout we value every life including the magnificent trees on this beautiful planet. That is why we use a Tree Safe nylon strap. Not only is this safer for the tree but is also safer for the user.