Ground Rod Clamps - Direct Burial 1/2" - Our Copper alloy Ground Rod Clamps are marked for direct burial.Ground Rod Clamps - Direct Burial 1/2" features include: Ground Rod Clamps - Direct Burial are cast of high strength copper alloy containing 80% or more Copper Silicon Bronze or Stainless Steel Bolt Designed to maintain proper contact and alignment between ground wire and rod Direct Burial marked on ground rod clamps UL467 Direct Burial approved for Direct Burial in Soil or Concrete cULus Listed Dimension Measurements = Inches Order Qty of 1 = 1 Piece Below is more info on our Ground Rod Clamps - Direct Burial 1/2"