I found one on a job (The Grand Junction Hilton) in 1983. It was laying on the ground and I thought one of the sheetrockers had dropped it. I asked around and nobody knew who it belonged to or where it came from. I kept it in my tool bucket for a couple of months. I used it to poke holes in cinderblock and center in sheetrock.
Every once and a while I used to find it around the garage, but I haven't seen it in years.
It is good to finally know what that almost tool looking thing was. Even 22 yrs later.
Chilly