A true oval carabiner that not only functions flawlessly but also helps orient gear and pulleys to the center of the carabiner to keep from side loading. The best feeling action out of any carabiner! Aluminum construction. DMMs patented Durolock is designed to provide a safe and easy quadruple-action auto-locking ability to minimize the chances of accidental gate opening and maximize security while still being able to open it with one hand. MBS: 25kN