【Ultra Secure Swing Hanger】: We provide thicker tree protector mats for free, they will prevent sudden breakage caused by prolonged friction. They are easy to attach to the tree with hook and loop, more secure. 【Heavy Duty 304 Stainless Steel D-Ring & Carabiner】: The 10mm screw-lock carabiners and 6mm D-rings are all forged from upgraded 304 stainless steel. No worries 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 (each 79cm long and 10cm wide); 2 screw-lock carabiners; 2 long straps (158cm) with D-rings.