East set-up and adjusting - Our ninja rings come with easy to open locking carabiners so you can easily move the rings to different points on the course. Mix and match with our monkey bars monkey knots climbing ropes and more. Metal buckles sold separately - required for connecting to Duble Obstacle Line Manufacturered by Lily's Things. Safe and high quality - We believe in safety before all else. Our ninja rings have been factory break tested to support up to 250 lbs and are made from high quality industrial strength materials. Very safe for your little ninjas. Money back guarantee - We are committed to your satisfaction. We offer a full 100% 30 day money back guarantee if for any reason you are not completely satisfied with our product. Double Reinforced rope - Unlike our competitors our ninja rings have double reinforced rope to support even more weight.