A good choice of carabiner shape can increase ergonomics and security for certain uses.
The shape of the carabiner frame has an influence on:
• major axis strength
• load distribution
• gate opening size, and capacity
• strength in certain positions
• ease of handling
Another less obvious effect is the balance of the carabiner itself: for example pear-shaped carabiners rotate more readily, which can result in poor positioning. D-shaped carabiners tend to stay in place better.
Peace on your Days