https://www.wolfsmarine.com/sea-dog-galvanized-quick-link-3-1-2/
Sea Dog Galvanized Quick Link 2-15/16", 3-1/2" 158010
Reusable and removable, quick links feature two-sided thread links designed for fast, easy connections between 2 lengths of chain or for attaching accessories...
galvanized quick linksea dog