General description The 1 Pack Black Ceiling Hooks for Hanging Chair is designed for versatile use, allowing you to hang chairs, hammocks, and other items securely. Made from high-quality 304 stainless steel, these hooks can support up to 1,100 pounds, ensuring safety for both children and adults. The innovative design features a 360-degree swivel that prevents tangling and twisting, providing smooth and stable operation. Technical specifications Material: 304 stainless steel Load capacity: 1,100 pounds Drill bit size for wooden walls: 6mm Drill bit size for concrete walls: 14mm Installation depth: 70mm Installation For wooden walls: 1. Mark the hole position with a marker. 2. Use a 6mm drill bit to drill a hole with a depth of 70mm. 3. Screw into the wooden wall. 4. After successful installation, hang your items. For concrete walls: 1. Mark the hole position with a marker. 2. Use a 14mm drill bit to drill a hole to a depth of 70mm. 3. Screw the expansion screw into the wall. 4. After