The M7 NC-4230 pneumatic impact wrench quickly removes machine-tightened nuts and bolts. It features a 1/2” square drive and a 3/4” bolt capacity. The air tool also has a forward torque range of 180-500ft-lb and a maximum reverse torque of 700ft-lb. That's enough to handle most tasks without delivering more torque than you need. It even features a thumb-operated multi-function forward reverse switch and speed switch at the rear of the tool. This air tool has a twin hammer clutch. It features one cycle with two hammers that make one impact per rotation. It is one of the most durable hammer designs. You can expect high torque when starting and continuous delivery throughout the workday. The twin hammer-style clutch also reduces vibration. This means you can use the NC-4230 for a long time without feeling fatigued.