Copper lugs with 1/4 inch eyelets are made from pure copper tubing and are flanged for easier cable insertion. The most common use for copper lugs is in electrically terminating battery cables and other power cables. These copper lugs fit onto 1/4'' studs and are available in cable sizes ranging from 6 gauge to 2/O gauge. Copper lugs are able to handle large amounts of current. The size of cable that the lugs fit is stamped onto the lug for easy identification.