Corrosion resistance, high safety, comfortable spring performance The spring helps relieve stress from impacts, provide a more comfortable, softer feel and increase the lifespan of your hammock, in addition to your mounting Perfect for Hammock Chairs, Porch Swings, Swinging Chairs, Punching Bags, or hanging any other heavy object from an overhead mount Name: Self-tapping screw hanging chair accessories Scope of application: General Series: Hanging chair accessories size:10*10*3cm Material:metal colour:Silver Package Contents: 1 * diamond buckle 1 * hook 1 * high strength spring 4 * countersunk head self-tapping screwdriver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.