One-hole lay-in lug, tin-plated aluminum, 6 American Wire Gauge (AWG) to 250 kcmil conductor size range, 0.33 inches stud hole size, 2.20 inches length, Used for quick installation of a continuous grounding conductor, UL 467 Listed for grounding and bonding, copper lugs UL Listed for direct burial in earth or concrete, UL Listed for use up to 600 V and temperature rated 90 degree C,Wire range-taking capability minimizes inventory requirements, saves cost