Catalog: GRDSR 58 Description: Zinc plated steel, 5/8” for Unthreaded ground rod Catalog: GRDSR 34 Description: Zinc plated steel, 3/4” for Unthreaded ground rod Catalog: GRBDH 58 Description: High tensile steel, 5/8” for Threaded ground rod Catalog: GRBDH 34 Description: High tensile steel, 3/4” for Threaded ground rod