Field Guardian Grounding Rod Clamp, 1/2-Inch These are made out of high strength, corrosion resistant copper alloy. Used to connect wire to 1/2" ground rods This grounding rod clamp is UL listed Packaged 1 per pack Main color is Copper These are made out of high strength, corrosion resistant copper alloy Used to connect wire to 1/2" ground rods This grounding rod clamp is up listed Packaged 1 per pack Main color is copper