2 IN1 WORK HEAD TURN INTO A DRILL: This electric impact wrench delivers to 420Nm of max torque, the 2 in 1 work head can be turned into a power drill directly without tools. This wrench uses a high power brushless motor. Rusty or over-tightened nuts and bolts can be easily removal. 4 VARIABLE SPEED CONTROL: This impact wrench is variable speed, once release the switch, the tool stop immediately, provides more security. It also with 4 speed control, you can choose the right gear according to your work needs. REVERSE AUTO STOP: Unique reverse auto stop function prevent misoperation during work, it protect the screw and nut from being damaged and slipping. This function can be turned off. LED LGITH & 1/2INCH CHUCK: Impact wrench with 1/2'' chuck can be used for automotive repairs, major construction projects, heavy equipment maintenance, or product assembly. The LED lamps illuminate the work area, allow to use in darkness. 10 PCS LITHIUM BATTERY CELLS: lithium battery high capacity that y