Anti-rust eye plate: The hook is made of high-quality stainless steel to prevent corrosion and rust, suitable for indoor and outdoor installations. Ring Hook with 4 Holes: Wall Anchors are designed with 4 holes for greater durability and stability. The stand is more secure than the stand with 2 holes. Using high-quality welding technology, it can safely support weights up to 500 kg. Rugged stainless steel construction provides greater strength. Wall Ring Creates Wider Space: Ceiling hammock hooks are so small for your room (probably smaller than the same type) that you can make the most of your overhead space. Heavy Duty Hook Applications: Ceiling hooks are great for yoga hammocks, hanging chairs, hanging swings, chandeliers, sling trainers, hanging caves, sun sails, hanging seats, hammocks, awnings, punching bags, punching bags, and more. Ceiling Hook Heavy Duty NOTE: Ceiling Mount Suspension Mount on concrete ceilings or wooden beams only using the mounting materials provided. Not suitable for drywall ceilings, clay walls or other soft building materials.