We are offering steel alloy. We make this product available in steel quarter turn-locking karabiner and are offered with a silver/golden yellow galvanized finish. It is offered with a captive pin on request. details material alloy steel minimum breaking strength 25 kngate opening 22.5mmnet weight 248.6gmce seriesconforms to en 362:2004 class b and ansi z 359.1 2007used for fall protectionshot blasted on request.