INCLUDES - 1 pc Hanging Chair Swing Spring, 1 pc Pin Plug Hardware, and 1 pc Bearing. The spring and U-pin plugs are made of steel, surface-treated with baked paint, rust-proof, corrosion-resistant. Upgraded Bearing Kit - The BEARING is made of steel, has great wear resistance, high temperature resistance, and high hardness. It can effectively increase lubrication and reduce noise. The spring can absorb vibrations when shaking, play a buffering role, increase the chair's lifespan, and make it more comfortable when shaking. WIDE APPLICATION - For use with almost all hanging chairs, egg chairs, porch swings, freestanding swings, hammocks, and hanging chairs. ROBUST SUSPENSION - With a load capacity of more than 500 pounds, the spring can meet the daily use of most families, which is consistent with the load capacity of common egg hanging chairs. EASY TO USE - You can refer to the picture for the installation sequence, the fork pin passes through the support and connects to the spring. You can install it or replace existing ones with it in minutes. QUALITY GUARANTEE - Each product has been carefully checked before packaging. Satisfaction Guarantee. If for any reason you are not completely satisfied, you can request a replacement or full refund, no questions asked._CA