Large, Clear Digital Readout. Can be set to zero setting at any position within measuring range. With a small locking thumb screw which locks the jaws in place. Very handy conversion chart at the back. Very Slim˜and Lightweight so easy to carry anywhere. One button changes unit from Metric to Inch and vice versa (true measurement, not calculated) Measure not only thickness, plus inner width, stepping, differential, and depth up to 6 inch Not to be confused with the smaller version. This is for professional use. Specification • Overall Length: 234mm • LCD Display Size 40mm x 15mm • Measuring range: 0?150 mm/ 0?6 in • Accuracy: + 0.02 mm/ 0.001 in, (<100 mm), + 0.03 mm/ 0.001 in. (>100 ? 150 mm) • Resolution: 0.01mm/ 0.0005 in • Repeatability: 0.01mm/ 0.0005 in • Maximum measurement speed: 1m/s • Power: 1 x 1.5V SR44 (silver oxide cell) battery • Battery life: 1 year for continuous usage/ 3 years under normal operation • Spare battery included • Size: 250 x 50 x 6 mm • Free blow moulded case with formed foam to protect the the gauge and give that professional look