The OEMTOOLS Heavy Duty 1/2" MAX Li-ion Impact Wrench, No. 24481, is used for tightening or loosening nuts and bolts, automotive repair, body shop maintenance, and other applications. The rubber, ergonomic grip adds comfort and reduces fatigue. The 20V MAX* Li-ion battery provides users with more torque power and longer battery life, says the company. Features include a two-speed transmission of 0-2,200 rpm and 0-2,900 ipm, a nut-busting torque of 300 ft-lb, and a tightening torque of 260 ft-lb. Included with the product is a 4.0 Ah Li-ion rechargeable battery with a charging station. *Voltage is measured without workload. Maximum initial battery voltage after charging. The nominal voltage is 18V.