The Dewalt DCG409 is part of the Flexvolt Advantage range of 18V tools Flexvolt Advantage tools are designed to identify Flexvolt batteries when in use and draw a higher current than a normal 18V machine is capable of. This in conjunction with the high power density brushless motor allows for more power and efficiency. Due to the high power density motor\'s increased magnets and more windings the grinder is able to deliver an unrivalled power output of 1553 watts with a 6Ah Flexvolt battery. The grinder features an E-Brake, E-Clutch and soft start to provide the user with class leading safety protection features. Features: Perform & Protect user protection systems Anti-Rotation E-Clutch & Kickback Brake Runs from XR 18v or FlexVolt batteries Gives 54% more power when used with FlexVolt battery Slide switch version for longer jobs 1-Touch Guard System allows for quick and easy guard adjustments without need for a tool Comes with: DCB546 6.0Ah battery DCB116 charger Side handle Guard Hex key TSTAK carry case Specification: Max. disc diameter: 125mm  No load speed: 9000rpm Variable speed: False Spindle thread: M14 Switch type: Slide Power Source: Cordless Battery Capacity: 6Ah Battery Chemistry: Li-Ion Perform and Protect: True Brake: True Clutch: True Quick Change Flange: True Supplied in Kitbox: True Weight (incl. battery): 2.8 Hand/Arm Vibration - Grinding: 8.3 m/s² Uncertainty K 1 (Vibration): 1.5 m/s² Hand/Arm Vibration - Sanding: 2.6 m/s² Uncertainty K 2 (Vibration): 1.5 m/s² Sound Pressure: 83 dB(A) Sound Pressure Uncertainty: 3 dB(A)