This brushless small cordless angle grinder requires no time changing brushes, and offers a longer motor life. DEWALT cordless grinder offers a high level of protection. Its break stops the wheel in 2 seconds or less. The Kickback Break engages maximum force to stop the wheel when there is a pinch, stall, or bind-up to reduce kickback. The grinder will also shut off in those events to further protect the user. Battery and charger are sold separately. Brushless motor of the angle grinder requires no brush changes. DEWALT grinders brake stops wheel in 2 seconds or less on average Kickback Brake engages when a pinch, stall, or bindup event is sensed and the electronic brake engages with maximum force to quickly stop the wheel, reduce the movement of the metal grinder and shut the grinder off. Features ESwitch Protection When the ONOFF trigger switch has a novolt 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 tool. Two stage trigger requires two actions to activate tool.