The Belay HMS Screw Carabiner is additionally attached to the climbing harness's tie-in loop with the internal wire catch. This has the advantage that the safety carabiner cannot twist with the safety device attached. The aluminium carabiner from LACD always holds its ideal position when securing and guarantees optimum operability. The Belay HMS Screw is easy and comfortable to operate with a reliable screw cap and a catch with Keylock System. For climbing beginners, the safety carabiner guarantees safe handling in the climbing hall and on the climbing rock, but experienced climbers also appreciate the reliable handling.