Heavy Duty: Each D-shaped aluminum carabiner is rated at 25KN and can support up to 5,500 pounds of weight, giving you more utility and reliability when climbing, hiking, rappelling, rescue, etc. Built to Last a Lifetime: Made of aircraft-grade 7075 aluminum, this carabiner is incredibly durable and long-lasting. In other words, you can load it with keys or attach it to a heavy bottle without worry. Convenient and Compact: Each carabiner measures 3.94" x 2.36"; Weight: 0.77 ounces; It's so light that you won't feel it when you put it on your hand. Its compact design makes it convenient and easy to carry. Secure Screw Lock Mechanism: The textured safety nut secures the carabiner from accidental slipping while increasing the strength of the door. The internal spring automatically keeps the door closed with one hand. Thanks to this improved locking spring, D-Lock carabiners will not loosen or let items slip. Multifunctional tool: a high-quality carabiner for you. Carabiners are perfect