High Quality Safety Hardware: The swing hardware and parts are made of SUS 304 stainless steel, which is permanently rust-proof, corrosion-resistant and high hardness. The roof swing hanger has a load capacity of 450 kg. Ultra-Quiet 360 Rotation Design: Our high-performance swing hook with flexible design can rotate 360, effectively prevent hanging ropes or chains from getting tangled. Designed with quiet nylon bushings to prevent friction and noise, great for punching bags and some yoga practice. WIDE APPLICATIONS: Our swivel swing hanger is suitable for concrete and wood beams for indoor and outdoor hanging ropes, and the perfect swing set for roofs, hanging chair swings, porch swings, rocking chairs, sandbags, or other heavy objects with overhead brackets. EASY INSTALLATION: Our unique hanger has 2 pre-drilled holes for screwing in with wood beams or concrete and installs in minutes. First draw the position of the hole with a marker pen, and drill the marked hole with a drill. Then press down on the spring screw or wood screw and tighten. Finally hang up the swing gear. Swing Anywhere: You will get a high performance swing set suspension set that includes 2 expansion screws for concrete and 2 screws for wood. Can be used in outdoor amusement parks and indoor home swings. You can enjoy swinging in the garden, or you can end it anytime.