Ground Clamp with Serrated Adaptor for Armored or Unarmored Wire 2-1/2"-4" - Our Armored Wire Clamp comes with a Serrated Armored Cable Adaptor for easy alignment.Ground Clamp with Serrated Cable Adaptor for Armored or Unarmored Wire 2-1/2"-4" features include: For connecting Armored Cable/Ground wire to water pipe, Copper tubing and ground rod Serrated Collar and Adaptor swings 360deg; for easy alignment Armored Wire Clamp Adaptors have serrations that match the Serration of the Ground Clamp Cast of High Strength High Conductivity Copper Alloy Steel set Screws are Zinc Plated for corrosion resistance Provides Maximum Conductivity amp; Strength UL Listed Dimension Measurements = Inches Order Qty of 1 = 1 Piece Below is more info on our Ground Clamp with Serrated Armored Cable Adaptor for Armored or Unarmored Wire 2-1/2"-4"