STURDY COMPLETE: Made of premium 304 stainless steel, durable, high strength, crosion resistance, high hardness, rust resistance, waterproof. Me robust safer. Wide scope of application: Our hanging chair springs can be used f hammock, punching bag st, swing, yoga towel, children's hanging chair, swing, Swiss chair, hanging seat, love swing, sling trainer, etc. 360 Rotation Design: The stainless steel swirl allows 360 free rotation to prevent your suspension (rope, chain, webbing, etc.) from spinning protect it from wear tear. Scope of delivery: 1 carabiner with spring (15 cm long), 2 climbing loops (8 cm long) 1 rotating hook 360 (9 cm long). All parts are made of stainless steel provide a me stable, smoother safer suspension. Easy to assemble: the two large carabiners are simply hooked into the eyelets of the spring, the carabiner can suppt a maximum load of 250 kg. With the steel spring, you can easily safely hang hammocks, hanging chairs. The unique integrated design can be installed in minutes.