ElectroGalvanized Formed Mild Steel Reusable and removable Quick Links feature twosided thread links designed for fast, easy connections between two lengths of chain or for attaching accessories to chain Hex shaped bolt for easy opening Ideal for chain repair, hammocks, and restraining gates Constructed of electrogalvanized formed mild steel for both galvanic and corrosion protection This product replaces 3158003, 1580031, 158003.