Welcome to the digital age of torque wrenches. You're probably thinking, why do I need a torque wrench? Because, without one, you'll never know if your wheels have been properly torqued. Ever see people by the side of the road with a wheel off? Most likely their wheels were not torqued properly. (Never assume that the guy at your local garage torqued them right, either...) Also, if you go to the track, torqueing your wheels every time you go out should be standard procedure. With this Digital Torque Wrench you simply set the target torque on the LED screen (very quickly I might add) and the wrench will emit an audible beep when you reach the target... plus the LED screen flashes! It's also simple to change over the screen to read in inch pounds, foot pounds or Newton meters. The usable range of this torque wrench is 10-200 N-m (7.4 - 147.5 Ft-lb). The half inch drive head has 36 teeth and an ergonomic, 20 7/8" handle that's comfortable to use. Built-in auto sleep mode conserves the two AA batteries, which are included. Accuracy exceeds all ISO 6789 and international standards. Includes storage case, its own serial number for documentation reference and to discourage pilfering, certificate of calibration accuracy, and our free Lifetime Testing Service.