DEWALT DCG405BWDCBP520 20V MAX XR Cordless Brushless 4.5 in. Slide Switch Small Angle Grinder with Kickback Brake with POWERSTACK 5Ah BatteryThis brushless small angle grinder requires no time changing brushes and offers a long motor life. Part of the PERFORM and PROTECT line of products, this grinder is equipped with Kickback Brake which engages with maximum force to stop the wheel when a pinch, stall or bind-up is detected. Power Loss Reset prevents accidental restarts following a power disruption when the tool is left in the on position. Our most powerful battery in its class, the 20V MAX DEWALT POWERSTACK 5.0 Ah Battery DCBP520 utilizes revolutionary pouch cell technology to deliver 50% more power, 50% more work per charge, and 2X the lifespan.