Hydraulic torque wrenches tighten and loosen bolts in industrial, oil and gas, wind energy, heavy manufacturing, and industrial processing plants. They are attached to a hydraulic pump and apply a specific amount of torque to the bolt to prevent overtightening that can damage or stress parts. Low-profile hydraulic torque wrenches are used in tight or recessed spaces. Square-drive hydraulic torque wrenches use interchangeable sockets to tighten and loosen nuts and bolts.