This was found in a collection of miscellaneous tools at work. Similar to a bolt extractor or "easy out", but the threads are way too fine and right-handed.
- Approx. 2.75" overall length.
- Hex end is 7/8".
- Approx. 24 threads per inch.
- Threads are clockwise/right hand.
Take a close look at the threads; it's hard to make out but they're serrated/angled (for lack of a better term) towards the narrow end.