How does a torque wrench work?
A torque wrench is a hand tool used to apply force in order to loosen or tighten a lug nut or bolt. Torque literally means the amount of force times length. You could apply 20 pounds of pressure on the handle of a one foot torque wrench, and it would apply exactly 20 pounds of pressure to the fastener. The same force applied to a two foot long handle, would provide 40 pounds of torque to fasten the lug nut.