RELIABLE FOR INDOOR AND OUTDOOR USE: Perfect support for hanging chairs, porch swings, rocking chairs and punching bags. Whatever you want to hang for yourself or your kids indoors or outdoors, it will hang securely and bring you fun and relaxation for a long time. HIGH QUALITY: All parts are made of 304 stainless steel for a more stable, smoother and safer suspension. Due to the special hardening process, all of these materials have good corrosion resistance and toughness. SUPER STRONG: The 19cm long spring can bear up to 160kg, perfect for all your heavy-duty needs. The spring can reduce the stress caused by impact when working and extend the service life of the assembly parts. Perfect kit for assembling your hanging hammock or swing chair. COMFORT: The spring helps relieve the stress of impact, provides a more comfortable and softer feel, reduces noise and vibration, and increases the lifespan of your hammock. The swivel hook attaches securely to your hammock or swing chair so you