Austrialpin 25.4mm/1" D-Ring Cobra Buckle (Black) Far exceeds ANSI Z359.1, CSA, EN, UIAA, and NFPA standards for fall protection Made from 12mm - 7075 aluminum alloy Stainless Steel adjuster, rivets, components, and D-ring. Brass clips. CNC Machined for flawless precision, reliability, and safety. No sharp edges.