I'm thinking that this is a production gauging tool. I can see it for
checking head height on something like a rivet, bolt, or other similarly
shaped item. Drop the unit under test into a hole and slide it under the
micrometer head and measure the head height from the disc with the holes in
it. I'm guessing that the disc with the holes in it is ground and the two
faces are parallel.
lg
no neat sig line

"rastus" wrote in message
news
You folks have any idea what this is?

http://img423.imageshack.us/img423/3490/000030nr.jpg