Features: Cordless impact wrench has powerful brushless motor and delivers torque up to 520Nm for effortlessly loosen or tighten rusted-on or over tightened screws, high efficiency and long service life. The diameter of screw is 22mm. Equipped with stepless variable speed switch, 2 gear speeds setting, easy to adjust the speed according to your demands and different scenarios. 1500mAh high capacity battery, provide longer running time, one charge supports 1.5 hours constantly working. LED working light provides illumination in dark spaces when you work. Ergonomic comfortable grip handle provides perfect balance and tool control, safe and labor-saving. Suitable for home renovation, construction projects, industrial equipment or spare parts maintenance, car repair, etc.