* To check & adjust angel between WINDSHIELD WIPER ARM AND WINDSHIELD
* Fixed adjustment tool at the front of the wiper arm adjusting angel with open-ended
wrench 24mm to suitable angle.
* Using range ± 20°
* Suitable specification of arm :
* LHD & RHD vehicle, driver's side 1.5 DEGREES +/- 3 DEGREES
* LHD & RHD vehicle, passenger's side 1.7 DEGREES +/- 3 DEGREE