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Easy to read through accurate scale with range of measurement from -5 up to +5 degrees. It has a powerful magnet could be easily mounted on all kinds of metal surface. Large adjuster knob for convenient zeroing of bubble during castor angle measurement. 1. Remove the four-wheel positioning sensor (fixture), remove the tire. 2. Carefully suck the magnetic gauge tool on the side of the brake wheel. 3. Adjust the gauge tool to zero. 4. Installed the required positioning special parts. 5. Use special tool, with the help of magnetic gauge tool's degree instruction to adjust the positioning parts to the required measurement angle. 6. If there is a little deviation when re-test with the positioning tool, just fine-tune at the bottom of the car.(Usually a slight deviation does not cause fault location)





