Please help ID a small brass pocket tool

[GarageMan]

Hello everyone
This small brass tool was found at a local estate. It's about 6 inches long extended and about 3/8 inch across by 3/16 inch wide.  Folds over into a sleeve and has a hanger on the end.  The blade looks like a mini I beam.  There is no sharp edge of any sort.   No markings. Anyone have any ideas?  Thanks in advance

[oldgoaly]

Sorta looks like it could be a welder's soap stone holder.

[GarageMan]

Thanks for the reply.  I don't see any way the stone or anything else could be captured or held in the blade part.  The part that flips open "blade" is about three inches long.

[oldgoaly]

you use it closed, only open it to put a new soap stone in.

[GarageMan]

Here is another picture that might show the tool differently.

[3baygarage]

Thinking it looks like a key to bookcase lock. Did you find it near a book shelf by chance?

[GarageMan]

Awsome.  You nailed it.  Thank you very much 3baygarage.  It was in the garage...

[oldgoaly]

hmmm got 2 or 3 of the little tool box looking parts and never knew what they were for. What type of book case a barrister's type like this one???

[3baygarage]

For the types of cabinets with 2 handles that can be locked together I believe.

Funny this item came up here. I learned what the lock and key were at an estate sale. They were  laying near a book shelf/wall cabinet. I think I may have inquired about the folding key because it looked out of place, more like a tool to me too.