Guess what this is for, weird tool

Not sure if you would call this an "automotive" tool but I've used them hundreds of times building cars, fixing engines and working on the car body. I know that my friends who have never seen them are amazed when I whoop them out and show how they help in a difficult situation:

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Thems are bullets. lol. Just look like center punches but have know idea why you would need so many different sized center punches. Maybe the dead end of a lathe?