Mystery Tool Please Help

hackley69

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20160121_192307.jpg 20160121_192347.jpg 20160121_192347.jpg 20160121_192307.jpg 20160121_192347.jpg Well I know someone can help me. I was given a military storage box full for machining tools mostly tool bits reamers and odds and ends. Several endmills were wrapped in news paper and after sometime searching I found a date of 1973 on one of the wrappers from a town somewhere in Alaska. But this was also in this box of tools and if someone can tell me what it is called and what is is used for I would appreciate it.
 
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I don't post alot and having a little trouble. Maybe you can see them now and if the admin. wants please correct it if you will.
 
Ahhh, Yes, that's a specmecular hydroventatulator. Use them all the time. The digital version is da chite. Sorry, just kidding. Mike
 
How long are they and what are the diameters?

To me they look like they might be used to cut sprue hole in green sand casting.

Found a couple of pictures of them, but nothing with this variety of sizes...

shalcoblowplategasket.jpg
IMG_1781.jpg

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shalcoblowplategasket.jpg

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shalcoblowplategasket.jpg

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shalcoblowplategasket.jpg

IMG_1781.jpg

shalcoblowplategasket.jpg

IMG_1781.jpg
 
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