This quality made stainless steel electronic digital caliper is one of our favorite tools around our warehouse, replacing other measuring tools that aren't as accurate or easy to use. We use this digital caliper for measuring stones and findings and anything else that needs a precise measurement. This electronic digital caliper measures from 0-150mm (.03mm accuracy, .01mm resolution) or with a push of a button, 0-6" (.001" accuracy, .0005" resolution). This gauge has a zero re-set button and a metric to inch conversion button. One year warranty. Includes two batteries, one installed, the other as a back-up, a plastic storage case and instructions. Uses 357 type replacement button cells or batteries.