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 5.0Ah Li-ion Batteries DCM849N Bare Unit, No Battery or Charger Specification Oscillating Speed 800-2,200/min. Backing Plate 180mm Spindle Thread 15.9mm The DEWALT DCM849N XR Brushless Rotary Polisher is supplied as a bare unit, NO battery or charger supplied.