?. Made from ASTM A27 cast steel and are built to withstand the toughest conditions. . No surface paint or finish to maintain quick, easy and safe weld-ability to the deck of any barge or workboat. . Designed specifically to guide mooring lines on deck. . They act as a guide to feed a line or wire in a particular direction while minimizing chaffing. . They are typically welded to the bulwark of a vessel.