Features: Multi-purpose, Heavy Duty, Lightweight, Durable, Rustproof & Snag Free Specification: Material: Aircraft Graded 7075 Aluminum Weight limit: 12KN ( equals to 2697 lbs each) Packing list: 4 Carabiners Attention: THESE CARABINERS ARE NOT INTENDED FOR CLIMBING. Great for camping, hiking, backpacking, trekking, cycling, fishing, hunting and travel etc.. Or simply use it as keychain carabiners or for leashes & harness for your lovely dog or cat. Rated at 12KN, features weight limit up to 2697lbs. This could even withstand the force of lifting some of mini cooper cars. (*Subject to different models). Please note, according to UIAA standard, the carabiners for climbing should be above 20KN (say 4496lbs). These are rated at 12KN (2697 lbs each) only, thus they are not for climbing according to UIAA standard, but they can definitely hold your weight for hammock hanging and etc.. If you want to buy climbing carabiners, please simply search B07PQHBGSH in Amazon's search box. Weighs only 0.71 oz. each, equals to the weight of 2 grapes. Thus it can minimize the weight for your outdoor gear or dog cat leashes & harness to the maximum extent. Super durable since it is made of aircraft grade aluminum. You can definitely use this for many years.