High quality: Permanent rust-proof SUS304 food grade stainless steel rotating ring, no rust, no corrosion, high hardness, non-toxic, non-polluting environment. Innovative design: Innovative bearing design rotation provides smooth and frictionless rotation, 360° free rotation, very compact and symmetrical rotation, total weight limit of 1,200 pounds, bearing 800 pounds of free rotation. Diamond Design:Wide eye openings of 2 Buckle support multiple carabiners and is triangular shaped, preventing rope or loads from sliding or shifting. Indoor and outdoor use: support hanging swing, hammock chair, climbing, aerial silk, pod children's swing, outdoor and indoor children's chair corners, web-shaped spider web round swing, N-shaped rotating swing, tree-shaped swing belt, cable Reliable and smooth rotation of tools, sandbags or wherever you need, no need to twist chains or ropes. Satisfactory service: Recommended for Ages 12+.Dolibest insists on using the highest quality materials and manufacturing techniques. We are confident to provide a money-back guarantee for our rings. In case they fail to fulfill their promises, please feel free to contact with us.US Patent Pending. All Rights Reserved.