1. Safety: For hanging a swing without damaging the tree. To prevent the straps from coming loose while swinging, we have equipped our carabiners with a heavy duty screw lock. Each strap has extra stitching on the fabric loops of the metal ring to provide sturdy and reliable attachment without tearing apart at the seams. Prevent straps from falling off during swinging. 2. High Quality Materials: Strap Material: Polyester Fabric, D-ring and D-type hook material: High Quality Stainless Steel, Size: 150 * 5 * 0.3cm, Product Collocation: Belt 2 + Storage Bag 1 + Strong D-ring 2 + Durable Cloth 2 sheets 3. Tree Protection: These swing hanging kits will not harm beautiful trees. They are equipped with a tree protection net so that the shoulder straps and trees will not be worn and damaged when shaken. 4. Superior Performance: Product selection of nylon rope, high waterproof index, wear-resistant and durable, exquisite workmanship, detailed orientation, maximum load: 0-550kg. 5. Easy to Use: Tree swing hanging kit for all swing sets. Use it to hang all types of swings, patio swings, porch swings, hanging chairs, baby carrier swings, porch swings and more. Both straps can be installed in under 5 minutes. No drilling or tools required. The straps also work with any size hammock and fit.