TW002G is a 1/2" square drive (C-ring without hole) impact wrench powered by a 40Vmax XGT Li-Ion battery. Maximum fastening torque 280 / 630 / 1,100 / 1,700Nm. Nut busting torque 2,200Nm.Electronic 4 stage impact power selection for added versatility, impacts per minute 0-1,700 / 1,800 / 2,000 / 2,400.Automatic impact stop system in forward/reverse rotation. eXtreme Protection Technology (XPT) is engineered for improved dust and water resistance for operation in harsh conditions. Battery protection circuit protects against overloading, over-discharging and over-heating.