A little OT, but I bought a large plastic container at a garage sale for $3. Mainly because it had 4 boxes of coated screws that I use often. Well worth what I paid. Anyway this tool (?) was in it. The black rings are about inch and a half and the thing adjusts with the geared smaller ring. The only hint is that there appears to be some kind of dry black glue/sealant on the black rings.

 

Ideas?

 

 

 

Looks like a jig for installing door lock sets? What is the name on the side in the first picture, does that say HILTI?

That would have been my guess too

does it have anything to do with gluing pipe together??

Lock set jig.

Door lock set is correct. After this was suggested, I looked it over carefully, no names anywhere. However when I emptied the box, I also found two hole saws. Never got a clue from that, until I tried them in the jig, Door lock set for sure.

So what would HILTI mean John?

Looks as though you got it right off.

HILTI is a popular brand of construction tools, hammer drills, and fasteners is what they are known for mainly. If it did say HILTI that could narrow down what it might be if we could track it down on the manufactures website. But I think we have all come to the correct conclusion, a lock set installation jig.

John, Hilti makes some industrial tools that would knock your socks off. We used one that would attach a bolt to an I beam one inch or thicker. If you used it improperly, it would actually blow through the I beam. Their cement hammer drill would go through 6 inches of cement about as fast as you could press the trigger. Great tools that get the job done really fast.

So true, as far as I am concerned, HILTI is the leader in fastening technology and tools to get it done. Not a whole lot of folks outside of the construction industry realize that HILTI's main bread and butter was and still is fastening systems and the tools to get it done, from drywall to concrete to steel, if you need to fasten something to something, no matter how small or how large, HILTI has the answer.

Hmmm, I do believe this may have been the very first of its kind "What's It" on this forum!

And possibly, one of the few correctly identified.

My guess was lawn sprinkler. 

 

2 minutes ago, Gene Howe said:

And possibly, one of the few correctly identified.

So true, so true!

If drilling guide doesn't work out try using it to hold your telescope.