Anyone Know What This Tool Is Used For?

Nope, again.
That's a professionally manufactured tool of some sort, but doesn't have a name on it.
It's got patent numbers stamped into it.
6044535
6327769
And use safety glasses.
If you google the patent numbers, you willl have it

https://patents.google.com/patent/US6327769+


Abstract

A tool for brake spring maintenance provides the ability both to release brake springs and then hold them out of the way for removal and replacement of brake shoes or for other maintenance operations related to drum brake arrangements. A main support bar is adapted to be received on an exposed wheel mounting member. The bar has a pair of threaded pins and cooperating threaded nuts for controlled axial movement of the pins. The pins have hooked ends and are situated for engaging respective brake springs whenever the tool is properly positioned on the exposed wheel mounting member. By rotating the threaded nuts to move the pins a set axial distance with the pin hooked ends engaged with the brake springs, such springs can be drawn back from their hold on the brake shoes, to permit disassembly and maintenance of the entire drum brake arrangement. The tool enables both brake springs to be released and held simultaneously, resulting in significant time savings and improved safety for overall drum brake maintenance operations.