CONVENIENT: The swivel spring hook can be firmly fixed on your hammock or swing; the spring can restrict the movement of the hammock, making the swing soft and comfortable.MATERIAL: Made of iron, with high hardness and durability; the suspension is smoother and safer, and the surface is coated, even if it is used for a long time, it will not rust.EASY TO INSTALL: Simply hook the two large swivel spring hooks into the spring eyelet, so any bracket and ceiling mount can be used.Widely Used: Swing springs are suitable for most types of hanging chairs, including swings, hammocks, hanging chairs, sandbags, etc.WHAT YOU GET: 2 spring hooks + 1 retractable spring, which is best for hanging chairs, sandbags and yoga.Specification:Material: IronColor: BlackSpring Length: 150MMCarabiner length: 80MMPackage including:1PCS * Swing Spring2PCS*Spring Hook