DMM Belay Master Product Description This carabiner allows climbers and belayers to climb with confidence, as it will not hold if the screw gate is not closed. It is the safest belay carabiner, featuring a perfectly molded super nylon locking system to prevent forgetting to close the safety gate. It prevents the carabiner from rotating in your hand, ensuring a correct belay position at all times. Weight: 99g Please make your judgment based on the photos. Use at your own risk.