【1】Set includes This 8 pieces hammock hanging kit includes a diamond pad, 4 wood beam locking screws, a spring, a swivel hook and a carabiner. 【2】High quality materials: The spring is galvanized. Ceiling mount bracket - 316 stainless steel plate with 4 wood screws for use on beams, wood, trees or boards. A stainless steel carabiner for hanging your hammocks or swing chairs. All of these materials have good corrosion resistance and toughness. 【3】Super strong: The spring can bear up to 200 kg. The spring can relieve stress caused by impact at work and extend the service life of the mounting parts. The swivel hook allows 360 degree rotation, which can prevent tangling or twisting. 【4】Easy to use: All kits come with detailed photo instructions, all you need is a screwdriver. With the kit, you can relax with no hassle. 【5】You can screw the hanger into the sturdy wooden beams or boards. Ideal for all common types of hanging chairs, including swings, hammocks, hanging chairs, punching bags,