Highly Conductive Brass Wire, Stable Current Transmission: comes with two 45cm brass connecting wires, strong conductivity, resistance, long-term stability of the grounding system, reduce resistance loss, and improve safety Flexible to Meet Different Needs: suitable for pipes or copper rods from 1/2 inch to 1 inch, adapted to wires of different thicknesses Suitable for Indoor and Outdoor Use: the clamp body is made of high-quality material, anti rust and anti oxidation, can be used for a long time in outdoor humid environment, and extend the life of the equipment You Receive Two Sets of Grounding Clamps: each set contains 4 heavy duty grounding clamps, serrated clamp design, tight bite to prevent loosening, suitable for different contact surfaces such as battery piles and metal frames, to reliable connection Essential Tools for Electrician DIY: a complete set is included out of , no additional accessories are required, and grounding work can be easily completed, suitable for electricians, car repairs, solar installation and other scenarios