Which type of wrench is specifically designed with serrated jaws to grip round objects?

The type of wrench designed specifically with serrated jaws to grip round objects is the pipe wrench. This tool features adjustable jaws that can grasp cylindrical items securely, preventing them from slipping while you apply torque. The serrated teeth on the jaws enhance the grip on pipes and tubing, making it especially effective for plumbing tasks where strong, reliable gripping power is essential.

In contrast, box wrenches have a closed end that fits over the heads of fasteners, primarily for turning hexagonal or square bolts and nuts. Open-end wrenches feature an open slot to grasp the sides of fasteners and provide less grip on round objects. Socket wrenches utilize interchangeable sockets to fit different fastener sizes, but they are not designed specifically for gripping round shapes. The unique design of the pipe wrench, with its serration and adjustment capability, is what sets it apart for tasks involving round materials.