Any ideas out there as to WHAT it is?
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On this side, there is a Cat.No. 199-5, a "1/2" , a diamond, and the word IMPERIAL,
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On this side: CHICAGO USA with a patent number. 2814225 ( hard to read) This thing has a trick or two
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Those two halves are both spring loaded, and act like a ratchet. Just don't get your finger in the way, them springs are strong, and close with a snap!
This was in the bottom of that old tool box I got over the weekend. Depending on which way you attach this to a bolt or nut, it will ratchet as you tighten or loosen the item.
Any Brand names for this thing? Was there a full line up of sizes? or, just this 1/2" one?