Annic 2pcs Heavy Duty Hammock Chairs Spring Made of high quality steel, sturdy and durable They are very sturdy and give a gentle springy action for hanging chairs. Provide a more comfortable, softer feel to porch swings, free-standing swings, hammocks and hammock chairs Zinc plated and clear coated for added weather resistance Dimensions: 2" in diameter and 8-3/4" in length