The rockD is the carabiner of choice when seeking the highest strength in a standard-sized aluminum frame. The i-beam profile at the bottom and top bends give the carabiner a sleek profile, while providing low weight and high strength characteristics. Super-strong Din. Slightly angled gate for ergonomics and a wider gate opening. Rated at 29kN. 0.95in Gate Opening. Details: The rockD is the carabiner of choice when seeking the highest strength in a standard-sized aluminum frame. The rockD carabiner serves the broadest range of specialized uses. The rockD in non-lanyard versions features a flattened shape with an i-beam profile at the bottom and top bends, giving the carabiner a sleek profile, while providing low weight and high strength characteristics. Tensile Strength: 6,519 lbs. 28.9 kN, WLL: 652 lbs. 2.9 kN