INCLUDES - 1 pcs Hammock Chair Swing Spring, 1 pcs Pin Plug, Hardware, and 1 pcs Bearing. The spring and U-pin plugs are made of steel, with a baked surface paint finish, making them rust-proof and corrosion-resistant. Upgrade Kit Bearing - The bearing is made of steel and offers excellent wear resistance, high temperature resistance, and high hardness. It can effectively increase lubrication and reduce noise. The spring can absorb vibrations when shaking, providing a buffering effect, increasing the chair's service life, and making it more comfortable during use. WIDE APPLICATION - Compatible with almost all hanging chairs, egg chairs, porch swings, free-standing swings, hammocks, and hammock chairs. SAFER SUSPENSION - With a load-bearing capacity of more than 500 pounds, the spring can meet the daily use of most families, which is consistent with the load-bearing capacity of ordinary egg hanging chairs. EASY TO USE - You can 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 the existing ones within minutes. QUALITY GUARANTEE - Every piece of product has been carefully checked before packaging. Satisfaction guaranteed. For any reason you are not completely satisfied, you can ask for a replacement or full refund, no questions asked.