I'm envisioning a gadget I can see a use for....

It would be made from spring steel, say coat-hanger diameter, in s
specific shape. Key to its use would be it could be bent in one way to
deploy it, but it would revert to its original shape.

What controls how much it can be bent without altering the final shape?

How is such made? I assume it's a combination of steel formulation and
post-manufacture heat treating; true?


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