Both torque wrenches have markings on the shaft with the pound/kilograms of force. For example the shaft marking goes up in increments of 10 pounds. The top of the handle has makings from 0 to 9. Turn the handle until the zero lines up with the right 10 pound increment (e.g., 20, 30, 50). If needed continue turning to increase the force in one pound increments (e.g., 22, 35, 77 pounds).