Locking pear-shaped carabiner with round-stock basket for smooth rope operation With a compact shape and SCREW-LOCK locking system, the ATTACHE carabiner is designed for use in a variety of belay applications. It has an H-shaped frame to keep the weight low and the round-stock basket creates a smooth surface for the rope to run over, for easier belaying with the VERSO, REVERSO, or a Munter hitch. The Keylock system helps prevent the carabiner from snagging during use.