Function: Measure the camber and casters on the hub or brake disc. Precise control of wheels and trucks. Simple horizontal adjustment from -5 to 5 degrees is possible. The magnetometer is attached to the axle or disc brake. Make adjustments to maintain proper wheel alignment and even tire wear. After disassembly, the rod supports can be restored to its original inclined position., How:Pause or check the amount of the camera before reinstalling. Size: 12.7x5cmColor: Black, SilverInstructions for Use:Remove the four-wheel alignment sensor (accessory) and remove the tire; Carefully lift the magnetic spirit level on the side of the brake wheel. Adjust the level to zero; Install the necessary special positioning parts; Using the degree indication of the magnetic level, use a special tool to adjust the positioning part to the desired measurement angle. If there is a slight deviation in the retest with the tracker, simply adjust it under the car. (Generally, small deviations will not cause positioning failure)Package Included:1*Car Positioning Level