This carabiner meets ANSI/ASSE Z359.1-2007 requirements.
ISC Klettersteig Carabiner with a twistlock gate
ISC’s Klettersteig Karabiner is constructed of heat-treated alloy steel. It has a twist lock gate with a 26 mm opening. The maximum breaking strength of this carabiner is 50 kN. It weighs 255 g.
Heat-Treated Alloy Steel
ISC – International Safety Components