The DeWalt 20V MAX ATOMIC Die Grinder, No. DCG420B, is designed to deliver optimized maneuverability and up to 445 MWO. This unit is equipped with the DeWalt ANTI-ROTATION System to help maximize control. This feature quickly stops the wheel when a pinch, stall, or bind-up event is sensed, reducing reactionary torque. An ergonomic design allows this tool to access ultra tight spaces.