This toe-in gauge is an accurate way to measure toe-in to within 1-32″. It can easily be done by one person. It works great with billet tire scribe (071 79610). To get a very accurate toe-in measurement, jack up the front wheels and scribe a true running line on the face of the tire. Place the gauge in front of the tires and align the pointers with the scribe lines. Then move the gauge to the rear of the tires and align the fixed end with the scribe line. On the other end loosen the thumb screws and move the slider until the pointer aligns with the other line. Then read the exact toe-in on the scale. Quick, easy, and accurate.