Features13/16 x 3-1/4 in bi-metal secondary bonding lug allows bonding to aluminum or steel surfaces from copper cable runsFor secondary bonding of small metallic bodies that require an aluminum connection for compatibility such as gutters, ladders, mechanical units and drain ventsTwo 5/16 x 3/4 in stainless steel bolts assure a positive electrical connectionEliminates need for an additional connectorRecommended installation tool 1/2 in socket wrench, end wrench or nut driver