The main differences between bi-metallic lugs and other types of cable lugs—like copper or aluminum lugs—come down to their construction, intended use, and the specific challenges they tackle in electrical installations. Construction and Material Bi-metallic lugs are crafted with an aluminum barrel (for connecting to aluminum cables) and a copper palm (for linking to copper term... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php