An X-4 torque multiplier is the tool of choice when you have no compressed air or electricity around to help you with that stubborn bolt. . Multiply your torque by a factor 4, 6, or as much as 14, depending on the model. You can even stack 2 or 3 units together to make the job even easier. It is possible to create up to 12,000 lbs of torque by hand depending on the combination of tools chosen. BESSEY. Simply better.