Versatile with 300kg spring capacity, it fits almost any punching bag, hanging chair, cocoon, egg chair, wicker basket The spring helps relieve impact pressure for a more comfortable, softer feel, extending the life of the hammock in addition to the mounting surface High quality materials. The spring is made of galvanized iron, which has higher corrosion resistance, is not easy to rust, and is more durable. Great show. You can use it with confidence Easy to assemble. Porch swivel spring with hooks on both ends for easy attachment to a hammock without tools or complications Rugged steel construction, galvanized and clear coated for longer life The spring helps relieve impact pressure, providing a more comfortable feel and extending the life of the hammock Rated spring capacity in excess of 300kg reduces noise, stress and vibration Suitable for garden swings, hanging baskets and hangers Specifications Material: Galvanized Iron Color: Silver Remember to check the condition of the hammock extension springs before use Package Contents: 1x Swing Accessory Set