[Material] All parts are made of metal, providing a more stable, smoother and suspension. The steel spring can be loaded up to 250 kg & therefore great for a safe & simple spring suspension of hanging chairs, hammocks, hanging chairs. [Easy to assemble] This rustproof snap hook is safe. The integrated design can be installed in minutes, which is neither time consuming nor labor intensive. [Comfort] The hanging chair swing spring set allows you to swing gently and comfortably, the steel spring can jump with the amplitude, and swings or rotates comfortably, which relaxes the human body. [Various applications] High-quality metal spring for many areas of use, whether , in the garden, on or when camping, traveling, fishing, hiking, sports and sailing. Suitable for lights, awnings, hammock chairs, porch swings, rocking chairs, punching bags, outdoor swings, aerial yoga, swivel grills, etc. [Practical] Hanging chair suspension set suitable for indoor and outdoor use, Such as indoor and outdoor carrying straps, awnings, rings, yoga swing hammocks, porch swings, rocking chairs, sandbags, hanging chairs and air yoga,etc. Material:Metal colour:Black Package Contents: 2 x snap hook 4 x Carabiner 2 x Swivel Ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.