About this item Strong steel construction. Zinc plated and clear coated for better weather resistance. Very strong and can be used for a long time. The spring helps relieve stress from impacts, provides a softer and more comfortable feel and will increase the life of your hammock as well as your seating surface to sleep. . Compatible with almost all punch bags, punch bags, hanging chairs, cocoons, egg chairs, wicker chairs, etc. Spring grip over 700 lbs . Contents: 2 x carabiners. Wire Diameter: 7mm/0.3" (Approx), Length: 108mm/4.25" (Approx). 2pcs. Heavy Duty Extension Carabiner Hanging Hook Accessories Swing Seats Fishing Spring Bag for Hanging Chair and Hammock Swing. - Heavy duty steel frame. Galvanized and transparent coating for greater resistance to atmospheric agents. - The spring helps relieve the stress of impacts, provides a more comfortable and soft feeling and increases the useful life of your hammock, for over its mounting surface. - Rated spring capacity over 700 lbs. - Suitable for almost any punching bag, hanging chair, cocoon, egg chair, wicker basket. Details: Item Name: Spring Hook Material: Metal Quantity : 2 pieces Features: Hammock accessories, durable, weatherproof Wire diameter: about 7mm/0.3" Length: 108 mm /4.25" (approx.) Package includes: 2 garden swing springs