Wbat is this parking brake part called and can they still be found

It activates the pads but I cant seem to get it to retract. A lot of corrosion but cleaned up well. Did I put together wrong?

I take it you have tried it with the shoes and return springs attached?

Yes, I even tried channel locks and it won’t retract. I am wondering if I put it back together wrong, goingto pull the other side to check and see if they are the same. There was a LOT of corrosion but cleaned up well and slid nicely before I put it back together.

I cleaned all the grease I put on, and just used wd40 and now they work.

Good to hear, so just too much ‘Lubrication’ !

Apparently the white lithium grease was to heavy, the wd40 worked.