... install 3.Heat treatment,more strength 4.CE,ISO Grounding Rod clampTerminal without threadmainly used for oil and chemical, ... maintenance cost of earth rod.3. Tensile strength: >=500N/mm2. Resistivity: <=0.05Ωmm1. The copper layer thickness: >=0 ... .254mmTechnical parameters:CLAMP 1CLAMP2CLAMP3CLAMP4clamp can be made of aluminium or brass Grounding Rod clamp