ISC manufactures an extensive line of superior quality aluminum carabiners. All carabiners conform to CE/EN standards and meet NFPA Technical Use strength requirements. The unique shape of the ISC carabiners are designed to limit cross-loading. Since the sides of the minor axis are not parallel, cross-loading causes the rigging point to slide to the ends resulting in transferring the load to the major axis. Available in Screwgate, Twistlock (2-Stage), Supersafe (3-Stage) and ISC's exclusive Quadlock (4-Stage). Gates are color-coded to identify locking style.