This is a heavy-duty stainless steel 316 quick link (also called a carabiner or screw gate link) with a 1/2-inch (12mm) diameter. Made from marine-grade 316 stainless, it's highly resistant to corrosion from saltwater, making it perfect for boating, sailing, mooring, or any outdoor rigging application. The brand is US Stainless, and the MPN is 7350-0120. It's brand new in its packaging. The screw gate ensures a secure closure, and the working load limit is substantial (check manufacturer specs). Use it for securing lines, chains, hoists, towing, climbing anchors (though not for life support unless rated), or general hardware in harsh environments. A versatile, strong, and rust-resistant piece of hardware that belongs in every mariner's or rigger's toolbox. The UPC is 759776161360.