Four-Wheel Alignment Magnetic Level Gauge Level Ruler 1. Measure the camber and caster angles on the wheel hub or brake disc. 2. Simple leveling adjustments from -5 degrees to 5 degrees can be made. 3. Install the magnetometer on the wheel hub or disc brake and adjust it to maintain correct wheel alignment and even tire wear. 4. Save equipment time, clear readings, and simple operation. 5. Suitable for precise control of caster and camber angles. Instructions for use: 1. Remove the four-wheel alignment sensor (clamp) and tire 2. Carefully suck the magnetic level on the side of the brake wheel 3. Zero the level 4. Install the special parts required for alignment 5. With the help of the degree indication of the magnetic level, use the special tool to adjust the alignment parts to the required measurement angle. 6. If a slight deviation is found when retesting with the alignment meter, just make a fine adjustment on the bottom of the vehicle. (Generally speaking, a little deviation not cause alignment failure) Color:Black Material:ABS Package Contents: 1set * four-wheel alignment magnetic level 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.