This heavy-duty spring is made of good material, which is suitable for hanging hammock chairs and other hanging accessories like punching bags, hanging plants, etc. It securely clips onto your swinging chair, let you and twisting without tangling or have to untwist. Low noise, stress and vibration. Features -Color:Silver, Black -Material:Galvanized Steel -Size:15.00X3.30X3.30cm/5.89X1.30X1.30in(Spring) -Size:7.30X4.00X1.60cm/2.87X1.57X0.63in(Buckle) -The adapter ring supports 360° rotation and , so it can be used more flexibly and widely, and can be suspended from any other heavy objects hanging from an elevated frame. -The swinging spring kit is stable and good, and the spring can jump with the amplitude, or rotate comfortably, so that the human body can relax. -You can suspend hammocks and chairs very safely and easily, while the rings are quick and easy for secure connections. -Suitable for porch , lamp, hammock chair, awning, sandbag, chair, , outdoor , etc. -Made of sturdy and practical material, which is not easy to break and deform. Package list: 1 x Spring 4 x Buckles