The DeWalt's ATOMIC 20V MAX 4" Angle Grinder, No. DCG400, is the company's first cordless 4" angle grinder compatible with standard 4" by 3/8" and 4" by 5/8" accessories. This tool is equipped with the DeWalt ANTI-ROTATION System to help maximize control, quickly stopping the wheel when the tool senses a pinch, stall, or bind-up event to reduce reactionary torque. An ergonomic design allows access to ultra-tight spaces, while the clip-on guard can quickly convert a Type B guard into a Type A guard. According to DeWalt, the grinder is 13% lighter than competitive pneumatic angle grinders and delivers up to 44% more power than 0.7 hp-rated pneumatic angle grinders.