The DEWALT DCM849 XR Cordless Rotary Polisher has a brushless motor for increased performance and run time It has a variable speed trigger and dial for better control during car headlight windshield and glass polishing applications The rubber gear case overmould reduces surface imperfections and improves gripping surface It can also be held via the front grip or side handle DCM849P2 2 x 18V 50Ah Li-ion Batteries DCM849N Bare Unit No Battery or Charger Specification Oscillating Speed 800-2200min Backing Plate 180mm Spindle Thread 159mm