Includes - 1 hammock, chair, swing, spring, 1 pc, pin socket hardware and 1 bearing. The spring and pin cover are made of steel, and the surface is painted to be rust-proof and corrosion-resistant. Bearing Upgrade Kit - The bearings are made of steel, which is very wear-resistant, high-temperature resistant and high-hard, which can effectively increase lubrication and reduce noise. The spring can absorb the vibration when shaking and play a buffering role, which extends the life of the chair and makes it more comfortable when shaking. WIDE APPLICATION - Works with almost all hanging chairs, egg chairs, porch swings, free-standing swings, hammocks and hanging chairs. Safer Suspension - The spring's load capacity is over 500 pounds, which can meet the daily use of most families, which is consistent with the load capacity of ordinary hanging egg chairs. Easy to use - you can refer to the picture for the installation sequence, the U-shaped pin goes through the bracket and connects to the spring. You can install it or replace your existing one in minutes. Quality Assurance - Each product is carefully inspected before packaging. Satisfaction Guarantee If for any reason you are not completely satisfied, you can request a replacement or a full refund, no questions asked