Made of aluminum-bronze that is Factory Mutual approved, these wrenches inhibit sparking and are nonmagnetic and corrosion resistant. They are also known as railroad wrenches.

Insert into a pipe or fitting and turn—the wrench grips the walls for easy installation and removal without marring the outside of the pipe.

Turn the end of the handle to set torque, and the wrench makes an audible click when it reaches the setting.