XUEMEI : Quantity: 2pcs color: silver Size Material: 7 mm , Length: 108 mm , heavy duty, strong, can hold up to 500 kg (1100lb), made by high quality Stainless Steel, sturdy steel construction, ood performance, orrosion-resistant, durable and safe. Safe and firm: Our hammock accessories are the parts you need to create an indoor and outdoor comfortable hanging chair, it attaches securely to your rocking chair so you can turn and rotate without getting tangled or turning, quiet, stress and vibration. Simple Assembly Relieve Collision: This swing hangers hooks with hooks on both ends, the swing spring is easily connected to your hammock chair without using any tools or complicated operation. The spring helps relieve stress from impacts, provide a more comfortable, softer feel and will increase the lifespan of your hammock, in addition your mounting surface. Widely Application: Enjoy your indoor and outdoor recreation with our spring swing hangling kit which is specifically designed to hang your swing bench, hanging chair, hammock or hammock chair, Swinging Chairs, punching bag or other heavy object, Introducing a unique even suspension system for hours of movement in silence with safe, smooth swinging pleasure. Perfect for your patio, porch, horizontal tree log or ceiling mount.