1Digital Thickness Gage Gauge: Measuring range is 017mm/0.5in. Resolution is 0.001mm/0.00005in. The paper thickness gauge is accurate to 1m which is perfect for the purposes of gauging paper to set a printing press impression pressure. You can even measure the thickness of a hair. 2Inch Metric Conversion: One button push conveniently allows the leather thickness gauge to switch measurements between mm and inches, and the unit can be switched immediately without resetting. It is suitable for all types of thickness measurement. 3Easy to Operate: Solid die cast and painted metal grip handle with thumb trigger make the thickness gauge tool easy to operate and hold. Uses a standard off the shelf LR44 button battery that is easy to change. 4With Storage Box: The sheet metal thickness gauge comes with a well fitted padded hard case for daily storage. The contact plates are finely grounded. That, combined with consistent spring tension, rather than thumb pressure pressing on the plates, provides accurate and repeatable results. 5Wide Application: The digital micrometer caliper is equipped with a large LCD display, which is used to accurately measure the thickness of materials, such as sheet metal, various papers, films, leather and wires.