The Snap-on Industrial Digital Torque Checker, No. QCDTC3250, tests the accuracy of both mechanical and electronic torque wrenches. With a range of 25-250 ft/lbs, it is designed to test 1/2" drive torque wrenches and uses an adapter to test 3/8” drive. The tool has three primary torque check functions: track, peak hold and first peak. The Digitial Torque Checker has a large, back-lit LCD display, an adjustable auto shutoff and is CE approved. It can be mounted on a wall or in a bench-top vice with the included hardware. Three AA batteries are included, or optional AC or DC adapters can used.