Wide Application: Our spring hook adapts to almost all types of hanging chairs, hammocks, egg chairs, rattan boxes, complete sandbags, yoga equipment, flower baskets, etc. And all other favorite sports. High Load Capacity: Made of high-quality spring steel, the robust steel construction ensures a maximum load of 500 kg per spring. High hardness, non-toxic environment and without pollution. Can be used with confidence. Durable: The hammock spring is galvanized; soaked spring steel, which is anti-corrosion and anti-rust, improves the weather resistance and service life of the porch swing. Buffer Function: The spring absorbs the shocks from the hammock's movement to relieve the stress from the shocks, providing a more comfortable and smoother feel. Increase the life of the hammock. Easy to Use: Length: 108 mm, width: 40 mm, diameter: 7 mm, with hooks at both ends, easily connect what you need to hang without using complicated tools or operations.