Petzl Grigri Old Model Black Diamond Old DMM Belay Master Set. This is an old model Petzl Grigri. It hasn't received any major impacts, but there are scratches, dirt, and signs of use. Instructions are not included. DMM Belay Master Product Description: This carabiner allows climbers and belayers to climb with confidence because it won't hold unless the screw of the carabiner is closed. It is the safest belay carabiner, employing a perfectly molded super nylon locking system to prevent forgetting to close the safety ring. It prevents the carabiner from rotating in your hand, ensuring the correct belay position at all times. Weight: 99g Please judge from the photos. Use at your own risk. This is a used item. Please refrain from purchasing if you are sensitive to such things. No claims, no returns. Thank you for viewing.