... .4.Choose different heads according to the diffrerent requirement.5.Adjust the speed to the mininum.6.Switch on,with the indicating lamp ... slowly.7.Adjust the speed controller to increase the speed.8.Switch to the foot if you choose to use foot push,the speed ... the polisher. Features: 1,Easy to use dialing speed control,2,Forward and reverse operation swith,3,Up to 25000RPM,4, Extremely quiet and ...