INCLUDES - 1 pc hammock chair swing spring, 1 pc pin plug hardware, and 1 pc bearing. The spring and U-pin plugs are made of steel with a baked surface paint finish for rust-proof and corrosion-resistant performance. UPGRADE KIT BEARING - The bearing is made of steel and offers excellent wear resistance, high temperature resistance, and high hardness. It helps improve lubrication and reduce noise. WIDE APPLICATION - Compatible with most hanging chairs, egg chairs, porch swings, free-standing swings, hammocks, and hammock chairs. SAFER SUSPENSION - With a load capacity exceeding 500 pounds, the spring meets the daily usage needs of most households and matches the typical weight capacity of standard egg hanging chairs. EASY TO USE - Installation can be completed in minutes. Refer to the included image for installation sequence. The clevis pin passes through the support and connects to the spring. Suitable for installation or replacement of existing hardware. QUALITY GUARANTEE - Each product is carefully inspected before packaging. Satisfaction guaranteed. If you are not completely satisfied for any reason, for a replacement or full refund.