Regular visitor Georganna Hancock has one of these contraptions, and she’s not quite sure what it is:
The well-made, apparently stainless steel object has an opening at one end, pocket clip at the other, and a sliding gizzie with two fixed settings. I’m guessing it’s a fancy tire pressure gauge, though the setting part confuses me. I haven’t tried it out.
What frustrates me is that I remember actually encountering a similar device, and I thought it was a tire gauge, and I was assured that it was not. What it was, though, I can’t recall to save my unworthy soul.