1316 stainless steel, strong and corrosion resistant, surface polished, high strength and hardness, durable. 2Climbing quick release device, high strength press button type shackle, high strength shackle connector. 3Unique designed of the snap, enables the shackle to be opened even when weighted, quick release connector buckle. 4Stainless steel fixed hand hook, for outdoor camping mountaineering downhill extension, mountaineering buckle fast directional connecting shackle. 5Small size and lightweight, easy to carry and store, convenient to use.