DEWALT 20V MAX XR 4-1/2" FLATHEAD GRINDER - TOOL ONLYThis small angle grinder features a brushless motor for an extended motor life and no need to change out old brushes. The grinders wheel stops within 2 seconds or less. And, its Kickback Break engages maximum force to stop the wheel when there is a pinch, stall, or bind up to reduce kickback, and will shut off for further protection.