The double beam is GA & Co’s signature chain — two arcs rising in parallel, repeated link by link, until the whole becomes something structural. At 15mm, the Medium is the size that anchors the collection. It closes with the tusk toggle: a tapered pin that fastens in a single motion, rounding out the form the way the chain begins it. Available in Gold Vermeil and Sterling Silver 15mm links, 7 length Tusk toggle clasp Designed in Los Angeles. In-stock pieces ship within 1–4 business days.