【Ultra Secure Swing Hanger】: We provide the thicker tree protector mats for free, they will avoid sudden breakage caused by long-time friction. They are easy to attach to the tree with hook and loop, more secure. 【Heavy Duty M10 Stainless Steel D-Ring & Carabiner】: The screw-locking carabiners and D-rings are all forged from upgraded M10 stainless steel. No worry when you swing with our hanging kit. 【Durable Strap Material】: The hammock straps are made of industrial and durable nylon, water-resistant and tear-resistant. With double stitches, the straps are stronger and prevent breakage. 【Suitable for All Swings】: High-strength tear-resistant straps + Stainless Steel Carabiner/D-rings, the swing strap is ideal for tree swings, tire swings, garden swings and porch/patio swings, hammock and camping. 【Package & Guarantee】: 2 pack tree protection mats; 2 screw-locking carabiners; 2 long straps with D-rings, 1 storage bag.