The Hercules 1/2" Ultra Torque Impact Wrench from Harbor Freight delivers 1,400 ft-lbs of bolt breakaway torque at speeds up to 1,600 rpm. The four-mode selector operates at three speed ranges of 550 rpm, 1,180 rpm, and 1,600 rpm. Auto mode sets the tool for automatic shutoff/bolt removal mode to prevent over-loosening fasteners, and auto-tighten mode to prevent over-tightening. An LED on the tool helps brighten the workspace for increased visibility, and an ergonomic design ensures that the tool fits comfortable in users' hands. The friction-ring anvil design provides socket retention and quick changes.