Safe, Reliable & Easy to Install: Our premium stainless steel ceiling hooks provide maximum protection against rust and corrosion, support up to 450 kg with superior welding process, suitable for indoor and outdoor installation. We have pre-drilled two holes for screwing onto wooden beams or concrete, can be installed in minutes. 360° Rotatable Design: Design with a sturdy heavy-duty hook, the hook can be rotated 360° and swiveled 180°. Makes the hook more flexible, but less shaking. To ensure safety, we have mounted a SUS304 stainless steel O-ring (stainless steel) to prevent the shaft from slipping. The hook loop is also strong enough to ensure safety. Multipurpose Use: Professional ceiling mount and stainless steel spring. Perfect for hanging chair, suspension, love swing, hammock, punching bag, punching bag, yoga mat, shade sail, loop trainer, hanging chair, hanging seat. Package includes: 2 ceiling mounts, 2 carabiners, 4 screws for concrete application, 4 screws for wood