This D-shape mountaineering buckle is made of aviation aluminum alloy with uniform coloring, featuring lightweight material, wear-resistant and corrosion-resistant. The spring buckle has good elasticity and high stability, the maximum tension can be up to 12KN, and the opening is large, so you can quickly connect a variety of supplies. It can be used to hang backpacks, water bottles, keys, hammocks, camping tents, outdoor quick-hangs, and can also be used for outdoor rock climbing, mountaineering, etc., bringing great convenience to your outdoor life!