Morris Products 91610 Heavy Duty Ground Clamp, 1/2 - 1" Pipe Range, 3/8 - 1" Rebar Range, 8 - 4/0 Wire Range Heavy Duty Ground Clamps - Heavy Duty Ground Clamps can be buried in earth or concrete Heavy Duty Ground Clamps are used to Connect Grounding Conductor to Water Pipe, Ground Rods, Copper Tubing or Rebar up to 1 in diameter Can Accomodate #8 Through 4/0 Gound Conductor can handle just about any size ground wire & just about any application Cast of High Strength High Conductivity Copper Supplied with Stainless Steel Set Screws