General description All swing hardware is made of high-quality 304 stainless steel, ensuring a rust-proof and durable swing bracket. This heavy-duty swing hook is perfect for various indoor and outdoor swing products, including swing springs, gymnastic rings, and aerial yoga setups. The innovative design features a customized mute nylon bushing and grease to eliminate metal friction, providing a quiet and stable swinging experience with 360° free rotation. Technical specifications Material: 304 stainless steel Size: 10 x 4 cm Package Contents: 2 x Inner Hexagon Expansion Bolts, 2 x Hexagon Wood Screws, 1 x Rotating Type Swivel Hook Measurement allowed error: +/- 1-3 cm