The carabiner with safety lock prevents accidental opening and provides you with the safest protection. High-quality material The D-ring and carabiner are made of stainless steel, rust-resistant and corrosion-resistant. More stable, sturdier and more durable, it effectively improves the stability of the swing and prevents it from falling. Provides multiple protections. Suitable for all swings. This swing accessory fits all types of swings and is perfect for classic swings, garden swings, tire swings, baby swings and more. Can also be used in hammocks, hanging chairs and various suitable applications. Your needs are met. Easy to install You can hang the swing in a minute without tools. Simply hang the wooden straps on branches or beams. Put the small D-ring in the large D-ring as close to the trunk as possible; hang up the hammock, screw in the carabiner and you're done! The lightweight swing set includes 2 150 cm hammock straps, 2 tree protection pads, 2 premium carabiners and 1 storage bag. You can store all the accessories in a handbag and take them to multiple locations. For example, in gardens, campsites, playgrounds, etc. Note: All data is measured manually, please allow 1-3 cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.