... ,easy install 3.Heat treatment,more strength 4.CE,ISO Earth Rod clamp Terminal without thread mainly used for oil and chemical ... copper wrap steel.4. Corrosion resistance: working life more than 30 years, relieve the maintenance cost of earth rod.3. Tensile strength ... 05Ωmm1. The copper layer thickness: >=0.254mmTechnical parameters: CLAMP 1 CLAMP2 CLAMP3 CLAMP4 clamp can be made of aluminium or brass