Dynamic belay points use which carabiners?

• A. Two non-locking carabiners
• B. Two screw gate carabiners or two auto locking
• C. One locking and one non-locking
• D. One aluminum and one steel

Answer: (B)

Dynamic belay points are subjected to movement and sudden loads, so the gates must stay closed to maintain a secure connection. Using two locking carabiners—either two screw-gate or two auto-locking—provides essential redundancy: both carabiners are kept closed during dynamic forces, reducing the chance that a gate could swing open and release the rope at a critical moment. If two non-locking carabiners were used, a gate could unintentionally open under load; mixing one locking and one non-locking leaves a single point where the connection could fail. The choice of aluminum vs steel doesn’t address this locking requirement, so it isn’t the determining factor here.