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.