Strong quality and safety guarantee: All accessories are made of 304 stainless steel, with high hardness, corrosion resistance, and weather resistance, which does not cause obvious surface stretching or aging. The hammock hanging kit with a flat top and a lock nut can maximize strength. It is suitable for all kinds of swings, hammocks, and punching bags with a working load not exceeding 350 kg. Special design: Integrated screw and gasket design, the wear-resistant gaskets on both sides are protected to reduce direct friction, provide high wear resistance, and keep quiet. The bracket with a lock nut can be rotated 180 vertically to better support the weight. The hanging hook bracket can rotate 360 freely and has a spring buckle to help you lock the hook firmly without falling off by itself. Easy to Install: Two 0.39-inch holes are pre-drilled on the hammock stand for bolting to concrete or wooden beams. Including 2 expansion bolts for concrete construction and 2 hex screws for wooden construction, as a complete set of accessories, it can be assembled in minutes. Removable Rotating Ring: Our hook can be flexibly assembled. By removing the rotating ring and placing it side by side with the spring carabiner, you can easily install heavy objects suspended by a strong chain or rope. Wide Range of Applications: Our hook is very suitable for indoor and outdoor relaxation, you can install it, and then hang the swing, hammock, aerial yoga sling for fun. It is also suitable for chandeliers, sun sails, punching bags, baby or toddler swings and any other heavy objects within the load range. Heavy Duty Hooks Suitable for Concrete Boards Specifications: Material: 304 Stainless Steel Weight: Hook: 0.24KG Carabiner: 0.061KG Expansion Bolt: Hexagon 0.042KG Screw: 0.026KG Package Includes: 1 x Hook 1 x Carabiner 2 x Expansion Bolts 2 x Hexagon Screws Installation Steps: 1. Draw the punch position 2. Drill two holes with a diameter of 8mm or 12mm and a depth of 70mm 3. Use a hammer to screw in 2 screws Hexagonal screws or 2 expansion bolts in the two screws to drill holes 4. Install the ceiling hook and tighten the screws with a wrench Features: The ceiling hook is made of high-quality 304 stainless steel, which can provide a more stable, smoother, and safer suspension. The load capacity is 350 kg. The bracket can be rotated vertically by 180, and the hook holder can be freely rotated by 360. You can easily install heavy objects suspended by chains or ropes that are not easy to break. Very suitable for hanging swings, hammock chairs, punching bags, aerial yoga belts, etc. Note: Not suitable for plasterboard ceilings, earth walls, or other flexible building materials. Make sure the surface you are climbing on can withstand the weight and forces involved.