A hydraulic wrench is a powerful tool used to tighten or loosen bolts and nuts with high torque. It operates using hydraulic pressure, which allows it to apply a significant amount of force without requiring much physical effort from the user. This makes it especially useful in heavy industries, such as construction and automotive repair, where large fasteners are common. These wrenches come in various sizes and designs, often featuring a socket that fits over the bolt or nut. Many professionals prefer hydraulic wrenches because they can quickly and efficiently handle tough jobs, making them an essential tool in any mechanic's or engineer's toolkit.