The Force Oval offers a first-class strength to weight ratio, and solid dependability thanks to the ISO Cold Forging process. The Force Oval carabiner offers multiple advantages over a D shape. The rounded external radius of the carabiner moves easily through hardware, and won't catch on webbing or other soft connections. And the symmetrical oval design offers predictable loading, making them perfect for aid climbing and rescue, where you don't want any load shifts when weighted. Also, the smooth internal curves of the oval offer a snag-free surface that is the perfect interface for ropes, webbing, and other soft goods.