Four wheel alignment level, magnetic level, tire phase alignment aid, car accessories Easy to read and use, save time and money Material: Aluminum Size: 15.5*8*6CM Package includes: 1pc x Magnetic Measuring Tool Instructions: 1Remove the four wheel alignment sensors (clamps) and remove the tires; 2) Carefully vacuum the magnetic level on the side of the brake wheel disc; 3. set the level to zero position; 4. attach the necessary positioning parts 5. Use the tool to adjust the positioning parts to the desired measurement angle using the magnetic level gauge. 6If a slight deviation is found during retrying the level, adjust it under the car. (In general, a small deviation does not cause a positioning error).