BL Brushless Motor delivers 520 ft.lbs. of Fastening Torque and 740 ft.lbs. of Nut-Busting Torque Compact and ergonomic design at only 6-11/16" long 4-speed power selection switch (0-500 / 0-1,200 / 0-1,900 / 0-2,200 RPM & 0-1,000 / 0-1,700 / 0-2,400 / 0-2,700 IPM) for precise fastening control in a wide range of applications 3 forward and 3 reverse Auto-Stop modes for increased efficiency Full speed mode function reduces trigger pull to reach full speed