Mirror bifold doors by Stanley

A handy person says:
My mirrored bifold doors are uneven, and I don't know how to make the adjustments. There are these plastic devices (8 per panel, total 16) in the corners of each door, so I am believing they are key parts. But when I put a tiny phillips screw driver and turn it, nothing happens. Can you help? Here are some pics.

Thank you for any assistance you might provide.
Thumbnail of the uploaded file named Bifold Corner Block
Thumbnail of the uploaded file named Stanley Closet Sticker
Thumbnail of the uploaded file named Stanley Corner Block
Thumbnail of the uploaded file named Mirror Bifold Door
Profile picture of Paul
Paul from SWISCO responded:

Hey there,

Thanks for posting! The adjustment is done at the bottom corner pivot, which is likely to be the 23-113. You'll need to use a wrench to loosen the nut which will extend the screw pivot out to raise and square the door.

I hope this helps!

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