The AmD lightweight asymmetrical carabiner is made of aluminum. It has a D shape particularly suited for connection to descenders. The fluid interior design and Keylock system facilitate handling. The Am?D carabiner is available in three locking systems: automatic TRIACT-LOCK or BALL-LOCK system, or the manual SCREW-LOCK system. Am’D may be used with a CAPTIV positioning bar to favor loading of the carabiner along the major axis, to limit the risk of it flipping and to keep it integrated with the device.