The Vulcan Screw-Lock carabiner from Petzl is a safety device for climbing and mountaineering. With a breaking strength of 27 kN, it is ideal for heavy loads. Its screw lock offers additional security against accidental opening. The pear-shaped design makes it easy to install additional ropes and carabiners, while the Keylock system eliminates unwanted snags. The Vulcan Screw-Lock is also made of aluminum for maximum lightness and extended use in harsh conditions.