FeaturesCold rolled threads with continuous, unbroken grain flows preserve copper coating and are stronger than cut threads99.9% pure electrolytic copper coatingMolecular bond to nickel sealed high strength steel coreRods have a high carbon steel core and tip that provide superior strength when drivingCopper coating will not crack when bent or tear when drivenMinimum copper coating of 10 mils on rods listed to UL 467NVent ERICO name, length, diameter and part number is roll stamped within 12 in of chamfered endUL logo and control number where applicable stamped on each rod for easy inspection after installation