Compression lugs and mechanical lugs are two forms of copper cable lugs employed to make safe electrical connections, but they vary greatly in design, fitting method, and usual applications. Compression lugs are fitted onto a cable by deforming the lug barrel over the conductor through the use of a crimping tool. This makes a permanent, gas-tight, and highly conductive contact. Com... https://www.pioneerpowers.com/copper-cable-lugs.php