Halex 36010 1/2-Inch To 1-Inch Solid Brass Grounding Clamp The product is 1" BRS HD GRND Clamp Easy to use The product is manufactured in China Use indoors or outdoors to secure the grounding wire to a 1/2-Inch through 1-Inch pipe Not UL or ACSA approved Fits 10-2 AWG Carded Solid Brass