Different carabiner shapes
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.
Positioning of the load in the strongest axis, closest to the spine side of the frame. Suited to simple loads (connection of devices, attachment to the anchor...).
Two separate attachment areas to optimize loading on the major axis, for specific uses.