Which tool is specifically designed to grip and rotate polished pipes without leaving marks?

The tool specifically designed to grip and rotate polished pipes without leaving marks is the strap wrench. This tool features a flexible strap that wraps around the pipe, providing a secure grip while minimizing the risk of scratching or damaging the polished surface. The design allows it to apply torque effectively without compressing the surface like a rigid tool would.

In contrast, an adjustable wrench can leave marks on polished surfaces due to its metal jaws, making it less suitable for this application. A socket wrench also does not have a mechanism designed to protect the surface of polished pipes, as it is generally used for fastening or loosening fasteners, and could potentially mar the finish. As for a walking stick, it is not a tool intended for pipe fitting or handling, making it irrelevant in this context. Therefore, the strap wrench stands out as the appropriate choice for gripping and rotating polished pipes without causing damage.