It is used to measure the height of the lower dead point of the swing arm and the height of the output shaft. It is used to improve the accuracy and consistency when adjusting the shock-absorbing suspension system. It is one of the indispensable tools for tuning the vehicle. It can accurately measure the height of the axle, ranging from 20mm to 25mm, and the adjustment spacing is fine to 0.2mm to meet professional needs. structural design: specially designed for 1/10 flat road RVs to accurate measurement and adjustment. Accurate and efficient: combined with a variety of measuring tools, it provides a comprehensive measurement solution to help you easily adjust the parameters of the model car. Easy to operate: The joint design makes the measurement and adjustment process simpler and faster, saving time. Joint design: flexible combination, easy to use. The measuring ruler is equipped with 2 10mm chassis adjustment bricks and 2 high- measuring wheels. Color: Black Material: Aluminium Package Contents: 1 * RC Car Height Ruler Tool kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.