Brushless motor requires no brush changes. Kickback brake engages when a pinch, stall or bind-up event is sensed and the electronic brake engages with maximum force to quickly stop the wheel, reduce the movement of the grinder and shut the grinder off. Two stage trigger requires two actions to activate tool. Brake stops wheel in 2 seconds or less on average. Features E-Switch protection; when the on/off trigger switch has no volt release function. In the event of a power outage or other unexpected shut down, the trigger switch will need to be cycled (turned off and then on) to restart the tool. Also included with the Grinder: a side handle, hex key, inner and outer flange, 4.5" type 27 guard, charger, (2) 6.0 AH batteries and a handy kit bag.