1. Springs and other hanging accessories (such as sandbags, hanging plants, etc.) are used for installing hanging chairs. 2. It can clamp the hanging chair components to the swing chair relatively firmly, reducing the possibility of jamming or loosening when rotating and twisting. 3. Made of high - strength alloy, it is lightweight and has a relatively sturdy structure. 4. With a relatively sturdy structure and using industrial - grade long coil springs, it is suitable for heavy - load needs. 5. The hook - shaped spring has features like low noise, low stress, and low vibration. It is a useful small tool for outdoor supplies. Features Material: Alloy material. Dimensions: Approximately 4.72x1.34x1.34 inches. Package contents: 1 screw, 1 hook, 1 silencer kit bolt assembly