D-shaped steel carabiners are mainly used in PPE against falls and rescue applications. Their high breaking strength, and the robustness and toughness of steel, make them ideal for use in harsh conditions. Steel carabiners are the recommended choice for use on steel structures and anchor points. These carabiners can also be cross-loaded along their minor axis. D-shaped carabiners will be used where wide contact surfaces and larger spread angles are needed.