My brother had this in his tool box. He got it from our uncle. Owatanna Tool Co. Model CF-71. We haven't had success opening beer bottles, so we have ruled out bottle opener. Thanks.
It is a spark plug gapper. I used to have one made by Snap On that looked just like the one in the picture.
Why would you need to adapt it? It's already a plug gapping tool as is. I have one too, but I've never used it
Remove the question mark. I've had one of those for forty years. Still works like a champ for the older cars. Newer plugs are gapped with a yardstick!