Includes: 1 Hammock Chair Swing Spring, 1 Pin Plug Hardware, and 1 bearing. The spring and U-pin plugs are made of steel with a surface paint baking process, making them rust-proof and corrosion-resistant. The upgraded bearing is made of steel, offering excellent wear resistance, high-temperature resistance, and high hardness. It effectively increases lubrication and reduces noise. The spring absorbs vibration while swinging, providing a buffering effect, extending the chair's lifespan, and enhancing comfort. WIDE APPLICATION: Suitable for use with almost all hanging chairs, egg chairs, porch swings, free-standing swings, hammocks, and hammock chairs. SAFER SUSPENSION: With a load-bearing capacity of over 500 pounds, the spring meets the daily use requirements of most families, consistent with the load-bearing capacity of standard egg hanging chairs. EASY INSTALLATION: Refer to the picture for the installation sequence; the clevis pin passes through the support and connects to the spring. You can install it or replace existing ones within minutes. QUALITY GUARANTEE: Each product is carefully inspected before packaging. Satisfaction is guaranteed. If you are not completely satisfied for any reason, you can request a replacement or a full refund, no questions asked.