Feature: Strong, durable and easy to install and use. Ceiling Mount - 304 stainless steel mounting plate securely bolts into beams, boards, concrete ceiling or any other overhead surface. Including 4 shield anchors M6*60 for concrete ceiling, 4 screws M5*60 for wooden beam. The spring has a capacity of about 500lb, and it helps relieve stress from impact. The swivel hook allows 360 degree rotation without any tangling or twisting, and the snap hook will securely clip onto your hammock or swinging chair. Great accessories for hammock chairs, porch swings, swinging chairs, punching bags, or hanging any other heavy object from an overhead mount. Heavy duty hook mount plate, spring, snap hook, and swivel hook for mounting hammock chairs and other hanging accessories like punching bags, hanging plants and so on. Specification: Color: Silver Material: 304 Stainless Steel + Carbon Steel Spring Capacity: Approx. 500LB Package Included: 1 x Diamond Pad Eye Plate (Ceiling Mounting Plate) 1 x Spring 1 x Snap Hook 1 x Swivel Hook 4 x Screws 4 x Shield Anchor Bolts The hammock chair is not included Notice: - Please allow 1-3CM differs due to manual measurement. - Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.