It’s made of a single piece of steel or a steel alloy, has a handle and shaft with a notch at the end of the shaft. I tried a google search and even a google image search using the photo below but couldn’t find it.

It is 5.5 inches (14cm) long.

What is this tool called and what is it used for?

enter image description here

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    It’s about 5 - 1/2 inches, or 14cm. – ChrisB Dec 25 '19 at 2:00
  • someone may have made it in a high school metalshop class – jsotola Dec 25 '19 at 2:22
  • Context of where you found it or got it. Looks like a plug follower someone made (used when removing a lock core) to keep pins and springs in the Bible. Or it looks like a custom made tamper proof spanner screwdriver. – Gunner Dec 25 '19 at 3:49
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    the knurled handle suggests a tool for a greasy environment – Jasen Dec 25 '19 at 5:00

It could be used for any of the following, depending on size:

  • A Schrader valve core tool, used for automotive tires (see examples)
  • A wing-nut tool, useful in tight places or to apply more force
  • A wire-wrap tool, if there is a recess at the end of the shaft
  • A tool for hand-bending metal contacts or light wire
  • It is a Shrader valve core tool. I found the model on Amazon. – ChrisB Dec 26 '19 at 20:37

It looks like a broken breaker bar with the end ground down for some specialty job. They are manufactured by many companies but here's a similar piece about the same size or it could be a larger one cut down. enter image description here

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    It’s probably not a breaker bar given it’s length of 5.5 inches. I added the length to my question. – ChrisB Dec 25 '19 at 2:07
  • I agree, breaker bars are usually way BIGGER than your hand. 5 - 6 inches is not going to give you extra leverage over a 5 - 6 inch wrench or socket. – Gunner Dec 25 '19 at 3:36
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    It could definitely be a breaker bar, they come in all sizes. Look at the picture in the answer, that is a breaker bar. +1 – Jimmy Fix-it Dec 25 '19 at 19:57
  • Good guess but as it turns out, it's a Schrader valve core tool. Breaker bars can come in that -length-, but the shaft diameter on the tool in question is much smaller than this breaker bar. – ChrisB Dec 26 '19 at 20:40

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