ISC manufactures an extensive line of superior quality aluminum carabiners. All carabiners conform to EN and ANSI standards and meet NFPA light 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, Supersafe and ISC's exclusive Quadlock. gates are color-coded to identify locking style.