The HERCULES® 20V Brushless Cordless 1/2 in. Ultra Torque Impact Wrench with Friction Ring delivers 1400 ft. lbs. of bolt breakaway torque at speeds up to 1600 RPM to power-off nuts and bolts FAST. The convenient 4-mode selector operates at three speed ranges of 0-550/0-1180/0-1600 RPM . Auto mode sets the tool for auto shutoff/bolt removal mode to prevent over-loosening fasteners, and auto-tighten mode to prevent over-tightening. Pair up with the HERCULES® 5.0 Amp Hour battery pack or greater to deliver more work per charge and more work over the life of the pack.