Double ended swivel ring is made of 304 stainless steel, which is hard and durable, does not rust and is resistant to corrosion, Industrial-grade swivel designed, Weight Limit - 550 kg. Smooth and frictionless for 360 degree smooth rotation prevents rope rotation, kinking and hockling. No more twisted ropes or chains. Come with 2 antirust SUS304 snap hooks whose manual screw gate Reduces chance of open-gate failure. And don't have sharpe points that can cut rope like others do. Extensive compatibility, Supports Hammocks, Aerial Silks, Hammock Pod Kids Swing, Outdoor and Indoor Kid's Chair Nook, Net Spider Web Round Swing, Swing Spin, Tree Swing Strap, Rigging. Used for the link between wire ropes and chains, used for outdoor mountaineering, hanging items, key chains, etc.