Made with a wide opening for use with rope, the Screw Link is a compact, lightweight alternative to carabiners for semi-permanent attachments. Stands up to force in any direction--including three-way loading when screwed closed. Constructed of galvanized steel for a breaking strength of 9,900 pounds. Triangular shape creates the room needed for cavers seat harness and all the gear which needs to be clipped into a central point. Links are marked with a Normal Working Load, NWL, which is about 1/5 of their strength. Please Note: Petzl products can only be shipped to US addresses.