Island Gale Swing Chair Hanging Swing Spring - 600LB Capacity Hammock Spring for Hanging Basket Chairs Hammock and Porch Swings (Silver)High quality material This spring are made of high quality stainless steel, baking process, so that its surface is more smooth, and rust resistant, corrosion resistance, durable. Longer Life The spring locates between the overhead support and swing chain helps relieve stress from impacts, and will increase the lifespan of your Hanging Basket Chairs hammock. Safer Because it is made of high quality stainless steel, so it is very safe to use, don't