This digital caliper is the worst I've ever owned or used.  The numerals are not uniform in size with the first being larger followed by 3 more which are much smaller.  It is thus hard to read and not convenient.  This, in my judgment, is a substandard unit and I'd never buy it again.  In fact I'd really like to return it for a refund and for the first time ever I'd state without equivocation.....DO NOT BUY THIS DEVICE.