EZ Sink Clips Undermount - Undermount Brackets, Supports - Epoxy - 10 Pack Kit - Kitchen - - Undermount Kitchen

Hello. Would anyone be kind enough to provide the dimension of the stud? I need the measurements for the plate, ie. the part with the holes. Thanks!

Can these be used on already mounted sinks? I want to replace the existing clips (which are different than these).

What's the measurement of the bracket offset - meaning the height distance from the flat part to the angled up part?

I recently purchased a home with an undermount sink and found they did not use undermounts only glue. Will this still work?