【1】Kit Includes: This 8-piece hammock hanging kit includes a diamond bearing, 4 wood beam locking screws, a spring, a swivel hook, and a carabiner. 【2】High-quality materials: The spring is galvanized. Ceiling mount: 316 stainless steel plate with 4 wood screws for use on beams, wood, trees, or planks. A stainless steel carabiner is included for hanging hammocks or swing chairs. All these materials have good corrosion resistance and toughness. 【3】Super durable: The spring can load up to 200 kg. The spring can relieve stress from impacts on the job and increase the life of the mounting hardware. The swivel hook allows for 360-degree rotation, preventing tangles or twisting. 【4】Easy to use: All kits come with detailed instructions in the images; all you need is a screwdriver. The kit lets you relax without any hassle. 【5】The hook can be screwed into beams or solid wood planks. Ideal for all major types of hanging chairs, including swings, hammocks, hanging chairs, punching bags, etc.