Welcome to the digital age of torque wrenches. With this Digital Torque Wrench you simply set the target torque on the LCD screen and the wrench will emit an audible "beep" when you reach the target. The LCD screen can be backlit for easier viewing. It's also simple to change the screen readout to inch-pounds, foot-pounds, Newton-meters or kilograms per meter. The usable range of this torque wrench is 20-200 N-m (14.8 - 147.5 Ft-lb). The half-inch drive head has 45 teeth and an ergonomic handle that's comfortable to use. Calibrated to ISO6789-2003 international standards.