Product Description Function: Material: hammock spring is made of metal. More corrosion resistance, not easy to rust, more durableEasy to use: with hooks on both ends, hammock hooks can be easily connected to your hammock chair without any tools or complicated operationsExtended service life: hammock extension spring helps reduce impact pressure and will increase the service life of the hammockReduce impact pressure: heavy duty extension hook can absorb impact of hammock movement, help reduce impact or vibration, so as to provide a comfortable use experienceMultiple uses: punch bag spring hook is suitable for almost all garden porch terrace and courtyard swing, hammock, hanging chair, punching bag, rattan egg chair, wicker basket, etc.Product DescriptionDescriptionHammock spring is made of metal. It has a solid structure and excellent performance. More corrosion resistance, not easy to rust, more durable, can be used at ease. Springs help reduce impact pressure, provide a more