The NSI RC58 Heavy Duty Rebar Ground Clamp with Adapter and Screw grips on 5/8" rebar for heavy-duty wire grounding in harsh outdoor environments. The lay-in style clamp allows for continuous loop wiring and will fit conductors in the range of 6 SOL to 2/0 STR Additionally, the stainless-steel hardware and cast silicon bronze clamp body are made from tough, high-quality metals that provide durable performance in the harshest outdoor environments. UL Listed for direct burial, use this clamp to ground copper