Check rod bolts the proper way, because sometimes torque readings may vary. With a special, high tension spring, this gauge remains conveniently positioned on the bolt during tightening, with adjustability for bolts up to 2.75 Inch long. Simply position the stretch gauge over the length of the rod bolt before applying torque, take a reading and record it. Then torque down to the proper torque setting and take another reading with the stretch gauge. Calculate the difference and check the manufacturer’s specification. .