At 38 kN, it's wicked-strong and represents the strongest and most durable design in life safety equipment. Through a precise forging process, material is put exactly where it will render the strongest design possible for a carabiner of its size. Caesar is the lightest aluminum alloy carabiner available to rival the strength of steel. Each carabiner is individually proof loaded and meticulously hand-inspected before leaving our ISO 9001 factory.