Mirror holes

[ryanmctee]

Help please. Can anyone tell me what this 'rivet'on my door is for? I am guessing that it is some sort of alignment for the mirrors? I'm trying to figure out what kind of mirrors to go with since the PO had put some super cheesy mirrors on the truck that didn't even allow the wind wings to open. I'm thinking of going with either the below eyeline mirrors in stainless if anyone has them, or Ford style truck mirrors. I just like the size/durability of bigger mirrors, especially on 4x4 trucks.