The Blackburn® line of Service Post Connectors is designed for applications including steel structure, fence post or transformer grounding involving one or two cables. Service Posts can also be used to tap one or two cables from bus bar. For copper to copper connections. For grounding of steel structures, fence posts or transformers using one or two cables. For tapping one or two cables from bus bar. Hex design bolts are machined from high-conductivity bronze alloy. Nuts and pressure bars are cold-formed from high-strength copper or copper alloy.