No hot work permit or drilling required! The line of CONSTRICTOR® Mechanical Grounding Connectors are used to ground cable to steel, I-beam, or other flanged surfaces, in applications where drilling is either not possible or unwanted. Rotating cap allows for parallel or perpendicular conductor orientation. Accepts beam thickness .125 - 1.000” (1/8 to 1”) and conductor ranges from #6 AWG to 500 kcmil. UL Listed and Direct Burial rated for earth and concrete. http://ow.ly/rdyG50CLZeV | Burndy