Includes - 1 Hammock, Chair, Swing, Spring, 1 Part, Pin Sleeve and 1 Bearing. The spring and cap are made of steel, with a painted surface for rust and corrosion resistance. Bearing Upgrade Kit - The bearings are made of steel, offering durability, high temperature resistance, and high hardness, which helps increase lubrication and reduce noise. The spring absorbs vibration during use, providing a buffering effect that extends the life of the chair and enhances comfort. WIDE USAGE - Compatible with most hanging chairs, egg chairs, porch swings, freestanding swings, hammocks, and hanging chairs. Safer suspension - Spring load capacity exceeds 500 pounds, suitable for typical household use and consistent with standard hanging egg chair weight limits. Easy to use - Installation follows the included image guide; the U-shaped pin passes through the bracket and connects to the spring. Installation or replacement can be completed in minutes. Quality Assurance - Each product is inspected before packaging. Satisfaction guaranteed if not completely satisfied, an exchange or full refund can be requested with no questions asked. Customer-first commitment with 24/7 support. Any issue will be addressed promptly to ensure a worry-free shopping experience.