The lightweight OK carabiner is made of aluminum. It has an oval shape that allows optimal loading of devices with a large cross-section, such as pulleys, rope clamps, and mobile fall arresters. Its fluid interior design and Keylock system facilitate handling. It is available in three locking systems: automatic TRIACT-LOCK or BALL-LOCK, or manual SCREW-LOCK. OK can be used with the CAPTIV bar to promote loading of the carabiner on the major axis, to limit the risk of rotation, and to keep it integrated with the device.