L.H. Dottie 25 Grounding Clamps are used to connect bare copper wire to water pipe, rebar, ground rod or copper water tubing for grounding or bonding. These grounding clamps fit 1/2-Inch to 1-Inch pipe sizes. 10 AWG (solid) to 2 AWG (stranded) conductor. Feature a bronze body and steel screws. UL listed. This listing is for a standard package containing 25 units.