Want to measure something quickly and accurately? Grab this quality-made stainless steel caliper and get perfection. The large, easy-to-read 7/8" LCD display automatically comes on once you move the roller wheel. The measuring beam reads in tenths of an inch and millimeters. The tail may be used for depth measurements. Measure inside and outside dimensions in millimeters and inches, including fractional readouts in inches! Don't worry about turning it off as the unit shuts down by itself after inactivity. Measures to 6" and 150mm. Includes a protective, foam-lined case, battery and a micro Phillips screwdriver for battery replacement. I keep one at my office desk and another in my tool cabinet. Give one to your son or daughter and he/she will use it forever.