I've got one similar to that one. I think Stew has one too. Which is where I first saw one.
Rather handy. I have some imperial drill bits with the sizes vaguely etched on the shanks. Very good drills, but the markings wear off.
Quick swipe with that caliper, and I'm away. Otherwise it's the mike and 'where is the damned plastic converter chart you get with M&W micrometers' ..

Can't remember the 32ths & 64ths decimals. Or a lot of 16ths either.
NO SPC output. What's that ?? Mine's just a screen I look at. Cheapskate version ???
JS is just jealous ...

Dave BC